ccs: log message when server spawned

for debugging

.taplo.toml

@@ -0,0 +1,32 @@
+[formatting]
+indent_string = "\t"
+reorder_keys = false
+reorder_arrays = false
+reorder_inline_tables = true
+
+[[rule]]
+include = ["**/Cargo.toml"]
+
+[rule.schema]
+path = "https://json.schemastore.org/cargo.json"
+enabled = true
+
+# schema definition for .cargo/config.toml is not yet available
+# see https://github.com/rust-lang/cargo/issues/12883
+
+[[rule]]
+include = ["**/Cargo.toml"]
+keys = [
+	"build-dependencies",
+	"dependencies",
+	"dev-dependencies",
+	"target.*.build-dependencies",
+	"target.*.dependencies",
+	"target.*.dev-dependencies",
+	"workspace.dependencies",
+	"workspace.lints.clippy",
+]
+
+[rule.formatting]
+reorder_keys = true
+reorder_arrays = true

Cargo.lock

@@ -185,9 +185,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.6.0"
+version = "2.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+checksum = "1be3f42a67d6d345ecd59f675f3f012d6974981560836e938c22b424b85ce1be"
 dependencies = [
  "serde",
 ]
@@ -239,19 +239,23 @@ checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
 name = "charge-controller-supervisor"
-version = "1.9.9-pre-4"
+version = "1.9.9-pre-30"
 dependencies = [
+ "bitflags 2.7.0",
  "chrono",
  "clap",
  "env_logger",
  "eyre",
  "futures",
+ "include_dir",
  "lazy_static",
  "log",
+ "notify-debouncer-mini",
  "prometheus",
  "rocket",
  "serde",
  "serde_json",
+ "thiserror 2.0.11",
  "tokio",
  "tokio-modbus",
  "tokio-serial",
@@ -379,7 +383,7 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b035a542cf7abf01f2e3c4d5a7acbaebfefe120ae4efc7bde3df98186e4b8af7"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "proc-macro2",
  "proc-macro2-diagnostics",
  "quote",
@@ -1167,7 +1171,7 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "libc",
  "redox_syscall",
 ]
@@ -1358,7 +1362,7 @@ version = "7.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c533b4c39709f9ba5005d8002048266593c1cfaf3c5f0739d5b8ab0c6c504009"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "filetime",
  "fsevent-sys",
  "inotify",
@@ -1589,7 +1593,7 @@ dependencies = [
  "rustc-hash",
  "rustls",
  "socket2",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "tokio",
  "tracing",
 ]
@@ -1608,7 +1612,7 @@ dependencies = [
  "rustls",
  "rustls-pki-types",
  "slab",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "tinyvec",
  "tracing",
  "web-time",
@@ -1673,7 +1677,7 @@ version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03a862b389f93e68874fbf580b9de08dd02facb9a788ebadaf4a3fd33cf58834"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
 ]
 
 [[package]]
@@ -1886,7 +1890,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b91f7eff05f748767f183df4320a63d6936e9c6107d97c9e6bdd9784f4289c94"
 dependencies = [
  "base64 0.21.7",
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "serde",
  "serde_derive",
 ]
@@ -1909,7 +1913,7 @@ version = "0.38.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f93dc38ecbab2eb790ff964bb77fa94faf256fd3e73285fd7ba0903b76bedb85"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -2051,7 +2055,7 @@ version = "4.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "779e2977f0cc2ff39708fef48f96f3768ac8ddd8c6caaaab82e83bd240ef99b2"
 dependencies = [
- "bitflags 2.6.0",
+ "bitflags 2.7.0",
  "cfg-if",
  "core-foundation",
  "core-foundation-sys",
@@ -2201,7 +2205,7 @@ dependencies = [
 
 [[package]]
 name = "tesla-charge-controller"
-version = "1.9.9-pre-4"
+version = "1.9.9-pre-30"
 dependencies = [
  "chrono",
  "clap",
@@ -2220,7 +2224,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serialport",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "tokio",
  "tokio-modbus",
  "tokio-serial",
@@ -2237,11 +2241,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.9"
+version = "2.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f072643fd0190df67a8bab670c20ef5d8737177d6ac6b2e9a236cb096206b2cc"
+checksum = "d452f284b73e6d76dd36758a0c8684b1d5be31f92b89d07fd5822175732206fc"
 dependencies = [
- "thiserror-impl 2.0.9",
+ "thiserror-impl 2.0.11",
 ]
 
 [[package]]
@@ -2257,9 +2261,9 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.9"
+version = "2.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b50fa271071aae2e6ee85f842e2e28ba8cd2c5fb67f11fcb1fd70b276f9e7d4"
+checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2374,7 +2378,7 @@ dependencies = [
  "futures-util",
  "log",
  "smallvec",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "tokio",
  "tokio-util",
 ]

Cargo.toml

@@ -4,15 +4,32 @@ default-members = ["charge-controller-supervisor"]
 resolver = "2"
 
 [workspace.package]
-version = "1.9.9-pre-4"
+version = "1.9.9-pre-30"
 
 [workspace.lints.clippy]
 pedantic = "warn"
-module-name-repetitions = { level = "allow", priority = 1 }
-struct-excessive-bools = { level = "allow", priority = 1 }
-too-many-lines = { level = "allow", priority = 1 }
-default-trait-access = { level = "allow", priority = 1 }
-cast-precision-loss = { level = "allow", priority = 1 }
+
+branches_sharing_code = "warn"
+derive_partial_eq_without_eq = "warn"
+equatable_if_let = "warn"
+fallible_impl_from = "warn"
+large_stack_frames = "warn"
+missing_const_for_fn = "warn"
+needless_collect = "warn"
+needless_pass_by_ref_mut = "warn"
+or_fun_call = "warn"
+redundant_clone = "warn"
+significant_drop_in_scrutinee = "warn"
+significant_drop_tightening = "warn"
+too_long_first_doc_paragraph = "warn"
+trait_duplication_in_bounds = "warn"
+
 cast-possible-truncation = { level = "allow", priority = 1 }
+cast-precision-loss = { level = "allow", priority = 1 }
+default-trait-access = { level = "allow", priority = 1 }
 missing-errors-doc = { level = "allow", priority = 1 }
 missing-panics-doc = { level = "allow", priority = 1 }
+module-name-repetitions = { level = "allow", priority = 1 }
+similar-names = { level = "allow", priority = 1 }
+struct-excessive-bools = { level = "allow", priority = 1 }
+too-many-lines = { level = "allow", priority = 1 }

charge-controller-supervisor/Cargo.toml

@@ -12,20 +12,24 @@ systemd-units = { enable = false }
 depends = ""
 
 [dependencies]
+bitflags = { version = "2.7.0", features = ["serde"] }
+chrono = "0.4.39"
 clap = { version = "4.5.23", features = ["derive"] }
+env_logger = "0.11.6"
+eyre = "0.6.12"
+futures = "0.3.31"
+include_dir = "0.7.4"
+lazy_static = "1.5.0"
+log = "0.4.22"
+notify-debouncer-mini = { version = "0.5.0", default-features = false }
+prometheus = "0.13.4"
+rocket = { version = "0.5.1", features = ["json"] }
 serde = { version = "1.0.216", features = ["derive"] }
 serde_json = "1.0.134"
+thiserror = "2.0.11"
 tokio = { version = "1.42.0", features = ["full"] }
-rocket = { version = "0.5.1", features = ["json"] }
-chrono = "0.4.39"
-prometheus = "0.13.4"
-env_logger = "0.11.6"
-log = "0.4.22"
-futures = "0.3.31"
 tokio-modbus = "0.16.1"
 tokio-serial = "5.4.4"
-lazy_static = "1.5.0"
-eyre = "0.6.12"
 
 [lints]
 workspace = true

charge-controller-supervisor/src/config.rs

@@ -1,23 +1,208 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+static CONFIG_PATH: std::sync::OnceLock<std::path::PathBuf> = std::sync::OnceLock::new();
+pub(super) static CONFIG: std::sync::OnceLock<tokio::sync::RwLock<Config>> =
+    std::sync::OnceLock::new();
+
+pub async fn access_config<'a>() -> tokio::sync::RwLockReadGuard<'a, Config> {
+    CONFIG.get().unwrap().read().await
+}
+
+pub(super) struct ConfigWatcher {
+    _debouncer: notify_debouncer_mini::Debouncer<notify_debouncer_mini::notify::RecommendedWatcher>,
+    _handle: tokio::task::JoinHandle<()>,
+}
+
+pub fn init_config(path: impl AsRef<std::path::Path>) -> Option<ConfigWatcher> {
+    let _ = CONFIG_PATH.get_or_init(|| path.as_ref().to_path_buf());
+    log::trace!("loading config...");
+    let config = Config::load(&path).unwrap();
+    if let Err(e) = config.save() {
+        log::warn!("couldn't save updated config: {e:?}");
+    }
+    log::trace!("watching config for changes...");
+    let config_watcher = ConfigWatcher::new(&path);
+    CONFIG.set(tokio::sync::RwLock::new(config)).unwrap();
+
+    config_watcher
+}
+
+impl ConfigWatcher {
+    pub fn new(path: impl AsRef<std::path::Path>) -> Option<Self> {
+        let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel();
+
+        let mut debouncer =
+            notify_debouncer_mini::new_debouncer(std::time::Duration::from_secs(1), move |v| {
+                tx.send(v).unwrap();
+            })
+            .ok()?;
+
+        debouncer
+            .watcher()
+            .watch(
+                path.as_ref(),
+                notify_debouncer_mini::notify::RecursiveMode::NonRecursive,
+            )
+            .ok()?;
+
+        let config_path = std::path::PathBuf::from(path.as_ref());
+
+        let handle = tokio::task::spawn(async move {
+            loop {
+                match rx.recv().await {
+                    Some(Ok(_event)) => {
+                        let config = Config::load(&config_path).unwrap();
+
+                        if let Err(e) = overwrite_config(config).await {
+                            log::error!("{e:?}");
+                        }
+                    }
+                    Some(Err(e)) => log::error!("Error {e:?} from watcher"),
+                    None => {}
+                }
+            }
+        });
+
+        Some(Self {
+            _debouncer: debouncer,
+            _handle: handle,
+        })
+    }
+}
+
+async fn overwrite_config(config: Config) -> eyre::Result<()> {
+    let mut h = CONFIG
+        .get()
+        .ok_or_else(|| eyre::eyre!("could not get config"))?
+        .write()
+        .await;
+    if h.charge_controllers != config.charge_controllers
+        || h.primary_charge_controller != config.primary_charge_controller
+    {
+        log::warn!("charge controller configuration changed on disk; please restart");
+    }
+    *h = config;
+    drop(h);
+    Ok(())
+}
+
+pub struct ConfigHandle<'a> {
+    handle: tokio::sync::RwLockWriteGuard<'a, Config>,
+}
+
+impl<'a> core::ops::Deref for ConfigHandle<'a> {
+    type Target = tokio::sync::RwLockWriteGuard<'a, Config>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.handle
+    }
+}
+
+impl std::ops::DerefMut for ConfigHandle<'_> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.handle
+    }
+}
+
+impl Drop for ConfigHandle<'_> {
+    fn drop(&mut self) {
+        if let Err(e) = self.save() {
+            log::error!("error saving config on drop of handle: {e:?}");
+        }
+    }
+}
+
+pub async fn write_to_config<'a>() -> ConfigHandle<'a> {
+    ConfigHandle {
+        handle: CONFIG.get().unwrap().write().await,
+    }
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[serde(tag = "version")]
+pub enum ConfigStorage {
+    #[serde(rename = "1")]
+    V1(outdated::ConfigV1),
+    #[serde(rename = "2")]
+    V2(Config),
+}
+
+mod outdated;
+
+impl Default for ConfigStorage {
+    fn default() -> Self {
+        Self::from_latest(Default::default())
+    }
+}
+
+impl ConfigStorage {
+    pub const fn from_latest(config: Config) -> Self {
+        Self::V2(config)
+    }
+
+    pub fn into_latest(self) -> Config {
+        match self {
+            ConfigStorage::V1(v1) => v1.into(),
+            ConfigStorage::V2(config) => config,
+        }
+    }
+
+    fn load(path: impl AsRef<std::path::Path>) -> eyre::Result<Self> {
+        Ok(serde_json::from_str(&std::fs::read_to_string(path)?)?)
+    }
+
+    fn save_to(&self, path: impl AsRef<std::path::Path>) -> eyre::Result<()> {
+        Ok(serde_json::ser::to_writer_pretty(
+            std::io::BufWriter::new(std::fs::File::create(path)?),
+            self,
+        )?)
+    }
+
+    fn save(&self) -> eyre::Result<()> {
+        self.save_to(CONFIG_PATH.get().unwrap())
+    }
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq, Default)]
 #[serde(default)]
 pub struct Config {
     pub primary_charge_controller: String,
+    pub enable_secondary_control: bool,
     pub charge_controllers: Vec<ChargeControllerConfig>,
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
-pub struct ChargeControllerConfig {
-    pub name: String,
-    pub serial_port: String,
-    pub baud_rate: u32,
-    pub watch_interval_seconds: u64,
-    pub variant: ChargeControllerVariant,
+impl Config {
+    fn load(path: impl AsRef<std::path::Path>) -> eyre::Result<Self> {
+        let storage = ConfigStorage::load(path)?;
+        Ok(storage.into_latest())
     }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+    fn save(&self) -> eyre::Result<()> {
+        let as_storage = ConfigStorage::from_latest(self.clone());
+        as_storage.save()?;
+        Ok(())
+    }
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+pub struct ChargeControllerConfig {
+    pub name: String,
+    pub watch_interval_seconds: u64,
+    pub variant: ChargeControllerVariant,
+    #[serde(default)]
+    pub follow_primary: bool,
+    pub transport: Transport,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub enum ChargeControllerVariant {
     Tristar,
     Pl { timeout_milliseconds: u64 },
 }
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "lowercase")]
+pub enum Transport {
+    Serial { port: String, baud_rate: u32 },
+    Tcp { ip: std::net::IpAddr, port: u16 },
+}

charge-controller-supervisor/src/config/outdated.rs

@@ -0,0 +1,72 @@
+pub use v1::ConfigV1;
+
+mod v1 {
+    use serde::{Deserialize, Serialize};
+
+    #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+    #[serde(default)]
+    pub struct ConfigV1 {
+        primary_charge_controller: String,
+        enable_secondary_control: bool,
+        charge_controllers: Vec<ChargeControllerConfigV1>,
+    }
+
+    #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+    struct ChargeControllerConfigV1 {
+        name: String,
+        serial_port: String,
+        baud_rate: u32,
+        watch_interval_seconds: u64,
+        variant: ChargeControllerVariantV1,
+        #[serde(default)]
+        follow_primary: bool,
+    }
+
+    #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+    enum ChargeControllerVariantV1 {
+        Tristar,
+        Pl { timeout_milliseconds: u64 },
+    }
+
+    impl From<ChargeControllerConfigV1> for crate::config::ChargeControllerConfig {
+        fn from(value: ChargeControllerConfigV1) -> Self {
+            Self {
+                name: value.name,
+                transport: crate::config::Transport::Serial {
+                    port: value.serial_port,
+                    baud_rate: value.baud_rate,
+                },
+                watch_interval_seconds: value.watch_interval_seconds,
+                variant: value.variant.into(),
+                follow_primary: value.follow_primary,
+            }
+        }
+    }
+
+    impl From<ChargeControllerVariantV1> for crate::config::ChargeControllerVariant {
+        fn from(value: ChargeControllerVariantV1) -> Self {
+            match value {
+                ChargeControllerVariantV1::Tristar => Self::Tristar,
+                ChargeControllerVariantV1::Pl {
+                    timeout_milliseconds,
+                } => Self::Pl {
+                    timeout_milliseconds,
+                },
+            }
+        }
+    }
+
+    impl From<ConfigV1> for crate::config::Config {
+        fn from(value: ConfigV1) -> Self {
+            Self {
+                primary_charge_controller: value.primary_charge_controller,
+                enable_secondary_control: value.enable_secondary_control,
+                charge_controllers: value
+                    .charge_controllers
+                    .into_iter()
+                    .map(Into::into)
+                    .collect(),
+            }
+        }
+    }
+}

charge-controller-supervisor/src/controller.rs

@@ -1,8 +1,17 @@
+use crate::storage::ControllerData;
+
+mod pl;
+mod tristar;
+
 pub struct Controller {
     name: String,
     interval: std::time::Duration,
     inner: ControllerInner,
-    data: std::sync::Arc<tokio::sync::RwLock<CommonData>>,
+    data: std::sync::Arc<ControllerData>,
+    follow_voltage: bool,
+    voltage_rx: tokio::sync::watch::Receiver<VoltageCommand>,
+    voltage_tx: Option<tokio::sync::watch::Sender<VoltageCommand>>,
+    settings_last_read: Option<std::time::Instant>,
 }
 
 #[derive(Default, serde::Serialize, Clone)]
@@ -12,70 +21,201 @@ pub struct CommonData {
     pub battery_temp: f64,
 }
 
+#[derive(serde::Serialize, Clone)]
+#[serde(tag = "model")]
+pub enum ControllerState {
+    Pl(pl::PlState),
+    Tristar(tristar::TristarState),
+}
+
+impl ControllerState {
+    pub fn common(&self) -> CommonData {
+        match self {
+            Self::Pl(pl_state) => crate::controller::CommonData {
+                battery_voltage: pl_state.battery_voltage,
+                target_voltage: pl_state.target_voltage,
+                battery_temp: pl_state.battery_temp,
+            },
+            Self::Tristar(tristar_state) => crate::controller::CommonData {
+                battery_voltage: tristar_state.battery_voltage,
+                target_voltage: tristar_state.target_voltage,
+                battery_temp: f64::from(tristar_state.battery_temp),
+            },
+        }
+    }
+}
+
+#[derive(serde::Serialize, Clone)]
+#[serde(tag = "model")]
+pub enum ControllerSettings {
+    Pl(pl::PlSettings),
+    Tristar(tristar::TristarSettings),
+}
+
+#[derive(Clone, Copy, Debug)]
+pub enum VoltageCommand {
+    None,
+    Set(f64),
+}
+
 impl Controller {
-    pub fn new(config: crate::config::ChargeControllerConfig) -> eyre::Result<Self> {
+    pub async fn new(
+        config: crate::config::ChargeControllerConfig,
+        voltage_rx: tokio::sync::watch::Receiver<VoltageCommand>,
+    ) -> eyre::Result<Self> {
         let inner = match config.variant {
             crate::config::ChargeControllerVariant::Tristar => ControllerInner::Tristar(
-                crate::tristar::Tristar::new(&config.serial_port, &config.name, config.baud_rate)?,
+                tristar::Tristar::new(&config.name, &config.transport).await?,
             ),
             crate::config::ChargeControllerVariant::Pl {
                 timeout_milliseconds,
-            } => ControllerInner::Pl(crate::pl::Pli::new(
-                &config.serial_port,
-                &config.name,
-                config.baud_rate,
-                timeout_milliseconds,
-            )?),
+            } => match &config.transport {
+                crate::config::Transport::Serial { port, baud_rate } => ControllerInner::Pl(
+                    pl::Pli::new(port, &config.name, *baud_rate, timeout_milliseconds)?,
+                ),
+                crate::config::Transport::Tcp { ip: _, port: _ } => {
+                    return Err(eyre::eyre!("pl doesn't support tcp"))
+                }
+            },
         };
 
-        let data = CommonData::default();
-
-        let data = std::sync::Arc::new(tokio::sync::RwLock::new(data));
+        let data = std::sync::Arc::new(ControllerData::new());
 
         Ok(Self {
             name: config.name,
             interval: std::time::Duration::from_secs(config.watch_interval_seconds),
             inner,
             data,
+            voltage_rx,
+            voltage_tx: None,
+            settings_last_read: None,
+            follow_voltage: config.follow_primary,
         })
     }
 
-    pub fn get_data_ptr(&self) -> std::sync::Arc<tokio::sync::RwLock<CommonData>> {
+    pub fn get_data_ptr(&self) -> std::sync::Arc<ControllerData> {
         self.data.clone()
     }
 
     pub async fn refresh(&mut self) -> eyre::Result<()> {
         let data = self.inner.refresh().await?;
-        *self.data.write().await = data;
+
+        if let Some(tx) = self.voltage_tx.as_mut() {
+            if crate::config::access_config()
+                .await
+                .enable_secondary_control
+            {
+                let target = data.common().target_voltage;
+                log::debug!(
+                    "tristar {}: primary: sending target voltage {}",
+                    self.name,
+                    target
+                );
+
+                tx.send(VoltageCommand::Set(target))?;
+            }
+        }
+
+        *self.data.write_state().await = Some(data);
+        if self.needs_new_settings() {
+            match self.inner.get_settings().await {
+                Ok(s) => {
+                    *self.data.write_settings().await = Some(s);
+                    self.settings_last_read = Some(std::time::Instant::now());
+                }
+                Err(e) => {
+                    log::error!("couldn't read config from {}: {e:?}", self.name);
+                }
+            }
+        }
 
         Ok(())
     }
 
-    pub fn timeout_interval(&self) -> std::time::Duration {
+    pub const fn timeout_interval(&self) -> std::time::Duration {
         self.interval
     }
 
     pub fn name(&self) -> &str {
-        &self.name
+        self.name.as_str()
+    }
+
+    pub fn set_tx_to_secondary(&mut self, tx: tokio::sync::watch::Sender<VoltageCommand>) {
+        assert!(
+            !self.follow_voltage,
+            "trying to set {} as primary when it is also a secondary!",
+            self.name
+        );
+
+        self.voltage_tx = Some(tx);
+    }
+
+    pub fn get_rx(&mut self) -> &mut tokio::sync::watch::Receiver<VoltageCommand> {
+        &mut self.voltage_rx
+    }
+
+    pub async fn process_command(&mut self, command: VoltageCommand) -> eyre::Result<()> {
+        match command {
+            VoltageCommand::Set(target_voltage) => {
+                if self.follow_voltage {
+                    self.inner.set_target_voltage(target_voltage).await
+                } else {
+                    Ok(())
+                }
+            }
+            VoltageCommand::None => {
+                // todo: disable voltage control
+                Ok(())
+            }
         }
     }
 
+    pub fn needs_new_settings(&self) -> bool {
+        self.settings_last_read.is_none_or(|t| {
+            std::time::Instant::now().duration_since(t) >= std::time::Duration::from_secs(60 * 60)
+        })
+    }
+}
+
+#[expect(clippy::large_enum_variant)]
 pub enum ControllerInner {
-    Pl(crate::pl::Pli),
-    Tristar(crate::tristar::Tristar),
+    Pl(pl::Pli),
+    Tristar(tristar::Tristar),
 }
 
 impl ControllerInner {
-    pub async fn refresh(&mut self) -> eyre::Result<CommonData> {
+    pub async fn refresh(&mut self) -> eyre::Result<ControllerState> {
         match self {
             ControllerInner::Pl(pli) => {
                 let pl_data = pli.refresh().await?;
-                Ok(pl_data)
+
+                Ok(ControllerState::Pl(pl_data))
             }
             ControllerInner::Tristar(tristar) => {
                 let tristar_data = tristar.refresh().await?;
-                Ok(tristar_data)
+
+                Ok(ControllerState::Tristar(tristar_data))
             }
         }
     }
+
+    pub async fn get_settings(&mut self) -> eyre::Result<ControllerSettings> {
+        match self {
+            ControllerInner::Pl(pl) => {
+                let settings = pl.read_settings().await?;
+                Ok(ControllerSettings::Pl(settings))
+            }
+            ControllerInner::Tristar(tristar) => {
+                let settings = tristar.read_settings().await?;
+                Ok(ControllerSettings::Tristar(settings))
+            }
+        }
+    }
+
+    pub async fn set_target_voltage(&mut self, target_voltage: f64) -> eyre::Result<()> {
+        match self {
+            ControllerInner::Pl(_) => todo!(),
+            ControllerInner::Tristar(tristar) => tristar.set_target_voltage(target_voltage).await,
+        }
+    }
 }

charge-controller-supervisor/src/controller/pl.rs

@@ -0,0 +1,671 @@
+use chrono::Timelike;
+use serde::{Deserialize, Serialize};
+use tokio::io::{AsyncReadExt, AsyncWriteExt};
+use tokio_serial::{SerialPort, SerialPortBuilderExt};
+
+use crate::gauges::{
+    BATTERY_TEMP, BATTERY_VOLTAGE, CHARGE_STATE, INPUT_CURRENT, PL_DUTY_CYCLE, PL_LOAD_CURRENT,
+    TARGET_VOLTAGE,
+};
+
+pub struct Pli {
+    friendly_name: String,
+    port: tokio_serial::SerialStream,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, Default)]
+pub struct PlState {
+    pub battery_voltage: f64,
+    pub target_voltage: f64,
+    pub duty_cycle: f64,
+    pub internal_charge_current: f64,
+    pub internal_load_current: f64,
+    pub battery_temp: f64,
+    pub regulator_state: RegulatorState,
+    // pub internal_charge_ah_accumulator: u16,
+    // pub external_charge_ah_accumulator: u16,
+    // pub internal_load_ah_accumulator: u16,
+    // pub external_load_ah_accumulator: u16,
+    // pub internal_charge_ah: u16,
+    // pub external_charge_ah: u16,
+    // pub internal_load_ah: u16,
+    // pub external_load_ah: u16,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum RegulatorState {
+    Boost,
+    Equalise,
+    Absorption,
+    Float,
+}
+
+impl From<u8> for RegulatorState {
+    fn from(value: u8) -> Self {
+        match value & 0b11 {
+            0b00 => Self::Boost,
+            0b01 => Self::Equalise,
+            0b10 => Self::Absorption,
+            0b11 => Self::Float,
+            _ => unreachable!(),
+        }
+    }
+}
+
+impl From<RegulatorState> for u8 {
+    fn from(value: RegulatorState) -> Self {
+        match value {
+            RegulatorState::Boost => 0b00,
+            RegulatorState::Equalise => 0b01,
+            RegulatorState::Absorption => 0b10,
+            RegulatorState::Float => 0b11,
+        }
+    }
+}
+
+impl Default for RegulatorState {
+    fn default() -> Self {
+        Self::Absorption
+    }
+}
+
+fn set_regulator_gauges(state: RegulatorState, label: &str) {
+    let boost = CHARGE_STATE.with_label_values(&[label, "boost"]);
+    let equalise = CHARGE_STATE.with_label_values(&[label, "equalise"]);
+    let absorption = CHARGE_STATE.with_label_values(&[label, "absorption"]);
+    let float = CHARGE_STATE.with_label_values(&[label, "float"]);
+
+    match state {
+        RegulatorState::Boost => {
+            boost.set(1);
+            equalise.set(0);
+            absorption.set(0);
+            float.set(0);
+        }
+        RegulatorState::Equalise => {
+            boost.set(0);
+            equalise.set(1);
+            absorption.set(0);
+            float.set(0);
+        }
+        RegulatorState::Absorption => {
+            boost.set(0);
+            equalise.set(0);
+            absorption.set(1);
+            float.set(0);
+        }
+        RegulatorState::Float => {
+            boost.set(0);
+            equalise.set(0);
+            absorption.set(0);
+            float.set(1);
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PlSettings {
+    load_disconnect_voltage: f64,
+    load_reconnect_voltage: f64,
+    delay_before_disconnect_minutes: u8,
+    days_between_boost: u8,
+    absorption_time: u8,
+    hysteresis: u8,
+    boost_return_voltage: f64,
+    charge_current_limit: u8,
+    battery_2_regulation_voltage: f64,
+    days_between_equalization: u8,
+    equalization_length: u8,
+    absorption_voltage: f64,
+    equalization_voltage: f64,
+    float_voltage: f64,
+    boost_voltage: f64,
+    program: Program,
+    system_voltage: SystemVoltage,
+    battery_capacity_ah: usize,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum Program {
+    Prog0,
+    Prog1,
+    Prog2,
+    Prog3,
+    Prog4,
+    Unknown,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum SystemVoltage {
+    V12,
+    V24,
+    V32,
+    V36,
+    V48,
+    Unknown,
+}
+
+#[expect(dead_code, reason = "writing settings is not yet implemented")]
+#[derive(Debug, Clone, Copy)]
+pub enum PliRequest {
+    ReadRam(u8),
+    ReadEeprom(u8),
+    SyncTime,
+    SetRegulatorState(RegulatorState),
+}
+
+impl Pli {
+    pub fn new(
+        serial_port: &str,
+        friendly_name: &str,
+        baud_rate: u32,
+        timeout: u64,
+    ) -> Result<Self, tokio_serial::Error> {
+        let port = tokio_serial::new(serial_port, baud_rate)
+            .timeout(std::time::Duration::from_millis(timeout))
+            .open_native_async()?;
+
+        Ok(Self {
+            friendly_name: friendly_name.to_owned(),
+            port,
+        })
+    }
+
+    pub async fn refresh(&mut self) -> eyre::Result<PlState> {
+        let new_state = self.read_state().await?;
+        BATTERY_VOLTAGE
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.battery_voltage);
+        TARGET_VOLTAGE
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.target_voltage);
+        PL_DUTY_CYCLE
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.duty_cycle);
+        INPUT_CURRENT
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.internal_charge_current);
+        PL_LOAD_CURRENT
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.internal_load_current);
+        BATTERY_TEMP
+            .with_label_values(&[&self.friendly_name])
+            .set(new_state.battery_temp);
+
+        set_regulator_gauges(new_state.regulator_state, &self.friendly_name);
+
+        Ok(new_state)
+    }
+
+    #[expect(dead_code, reason = "writing settings is not yet implemented")]
+    pub async fn process_request(&mut self, message: PliRequest) -> eyre::Result<()> {
+        match message {
+            PliRequest::ReadRam(address) => {
+                let data = self.read_ram_with_retires(address).await?;
+                log::warn!("Read RAM at {address}: data {data}");
+            }
+            PliRequest::ReadEeprom(address) => {
+                let data = self.read_eeprom(address).await?;
+                log::warn!("Read EEPROM at {address}: data {data}");
+            }
+            PliRequest::SyncTime => {
+                let now = chrono::Local::now();
+                let timestamp = (((now.hour() * 10) + (now.minute() / 6)) & 0xFF) as u8;
+                let min = (now.minute() % 6) as u8;
+                let sec = (now.second() / 2).min(29) as u8;
+                self.write_ram(PlRamAddress::Hour, timestamp).await?;
+                self.write_ram(PlRamAddress::Min, min).await?;
+                self.write_ram(PlRamAddress::Sec, sec).await?;
+                log::warn!(
+                    "Set time: {now} corresponds to {timestamp} + minutes {min} + seconds {sec}"
+                );
+            }
+            PliRequest::SetRegulatorState(state) => {
+                log::warn!("Setting regulator state to {state:?}");
+                self.write_ram(PlRamAddress::Rstate, state.into()).await?;
+            }
+        }
+        Ok(())
+    }
+
+    pub async fn read_settings(&mut self) -> eyre::Result<PlSettings> {
+        let load_disconnect_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::LOff).await?) * (4. / 10.);
+        let load_reconnect_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::LOn).await?) * (4. / 10.);
+        let delay_before_disconnect_minutes = self.read_eeprom(PlEepromAddress::LDel).await?;
+        let days_between_boost = self.read_eeprom(PlEepromAddress::BstFreq).await?;
+        let absorption_time = self.read_eeprom(PlEepromAddress::ATim).await?;
+        let hysteresis = self.read_eeprom(PlEepromAddress::Hyst).await?;
+        let boost_return_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::BRet).await?) * (4. / 10.);
+        let charge_current_limit = self.read_eeprom(PlEepromAddress::CurLim).await?;
+        let battery_2_regulation_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::Bat2).await?) * (4. / 10.);
+        let days_between_equalization = self.read_eeprom(PlEepromAddress::EqFreq).await?;
+        let equalization_length = self.read_eeprom(PlEepromAddress::ETim).await?;
+        let absorption_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::AbsV).await?) * (4. / 10.);
+        let equalization_voltage =
+            f64::from(self.read_eeprom(PlEepromAddress::EMax).await?) * (4. / 10.);
+        let float_voltage = f64::from(self.read_eeprom(PlEepromAddress::FltV).await?) * (4. / 10.);
+        let boost_voltage = f64::from(self.read_eeprom(PlEepromAddress::BMax).await?) * (4. / 10.);
+        let volt = self.read_eeprom(PlEepromAddress::Volt).await?;
+        let program = match volt >> 4 {
+            0 => Program::Prog0,
+            1 => Program::Prog1,
+            2 => Program::Prog2,
+            3 => Program::Prog3,
+            4 => Program::Prog4,
+            _ => Program::Unknown,
+        };
+        let system_voltage = match volt & 0xF {
+            0 => SystemVoltage::V12,
+            1 => SystemVoltage::V24,
+            2 => SystemVoltage::V32,
+            3 => SystemVoltage::V36,
+            4 => SystemVoltage::V48,
+            _ => SystemVoltage::Unknown,
+        };
+        let battery_cap = usize::from(self.read_eeprom(PlEepromAddress::BCap).await?);
+
+        let battery_capacity_ah = if battery_cap > 50 {
+            (50 * 20) + ((battery_cap - 50) * 100)
+        } else {
+            battery_cap * 20
+        };
+
+        Ok(PlSettings {
+            load_disconnect_voltage,
+            load_reconnect_voltage,
+            delay_before_disconnect_minutes,
+            days_between_boost,
+            absorption_time,
+            hysteresis,
+            boost_return_voltage,
+            charge_current_limit,
+            battery_2_regulation_voltage,
+            days_between_equalization,
+            equalization_length,
+            absorption_voltage,
+            equalization_voltage,
+            float_voltage,
+            boost_voltage,
+            program,
+            system_voltage,
+            battery_capacity_ah,
+        })
+    }
+
+    async fn read_state(&mut self) -> eyre::Result<PlState> {
+        // let int_charge_acc_low = self.read_ram(PlRamAddress::Ciacc1).await?;
+        // let int_charge_acc = self.read_ram(PlRamAddress::Ciacc2).await?;
+        // let int_charge_acc_high = self.read_ram(PlRamAddress::Ciacc3).await?;
+        // let mut internal_charge_ah_accumulator = u16::from(int_charge_acc_high) << 9;
+        // internal_charge_ah_accumulator |= u16::from(int_charge_acc) << 1;
+        // internal_charge_ah_accumulator |= u16::from(int_charge_acc_low & 0b1);
+        // let int_charge_low = self.read_ram(PlRamAddress::Ciahl).await?;
+        // let int_charge_high = self.read_ram(PlRamAddress::Ciahh).await?;
+        // let internal_charge_ah = u16::from_le_bytes([int_charge_low, int_charge_high]);
+
+        // let int_load_acc_low = self.read_ram(PlRamAddress::Liacc1).await?;
+        // let int_load_acc = self.read_ram(PlRamAddress::Liacc2).await?;
+        // let int_load_acc_high = self.read_ram(PlRamAddress::Liacc3).await?;
+        // let mut internal_load_ah_accumulator = u16::from(int_load_acc_high) << 9;
+        // internal_load_ah_accumulator |= u16::from(int_load_acc) << 1;
+        // internal_load_ah_accumulator |= u16::from(int_load_acc_low & 0b1);
+        // let int_load_low = self.read_ram(PlRamAddress::Liahl).await?;
+        // let int_load_high = self.read_ram(PlRamAddress::Liahh).await?;
+        // let internal_load_ah = u16::from_le_bytes([int_load_low, int_load_high]);
+
+        // let ext_charge_acc_low = self.read_ram(PlRamAddress::Ceacc1).await?;
+        // let ext_charge_acc = self.read_ram(PlRamAddress::Ceacc2).await?;
+        // let ext_charge_acc_high = self.read_ram(PlRamAddress::Ceacc3).await?;
+        // let mut external_charge_ah_accumulator = u16::from(ext_charge_acc_high) << 9;
+        // external_charge_ah_accumulator |= u16::from(ext_charge_acc) << 1;
+        // external_charge_ah_accumulator |= u16::from(ext_charge_acc_low & 0b1);
+        // let ext_charge_low = self.read_ram(PlRamAddress::Ceahl).await?;
+        // let ext_charge_high = self.read_ram(PlRamAddress::Ceahh).await?;
+        // let external_charge_ah = u16::from_le_bytes([ext_charge_low, ext_charge_high]);
+
+        // let ext_load_acc_low = self.read_ram(PlRamAddress::Leacc1).await?;
+        // let ext_load_acc = self.read_ram(PlRamAddress::Leacc2).await?;
+        // let ext_load_acc_high = self.read_ram(PlRamAddress::Leacc3).await?;
+        // let mut external_load_ah_accumulator = u16::from(ext_load_acc_high) << 9;
+        // external_load_ah_accumulator |= u16::from(ext_load_acc) << 1;
+        // external_load_ah_accumulator |= u16::from(ext_load_acc_low & 0b1);
+        // let ext_load_low = self.read_ram(PlRamAddress::Leahl).await?;
+        // let ext_load_high = self.read_ram(PlRamAddress::Leahh).await?;
+        // let external_load_ah = u16::from_le_bytes([ext_load_low, ext_load_high]);
+
+        Ok(PlState {
+            battery_voltage: f64::from(self.read_ram_with_retires(PlRamAddress::Batv).await?)
+                * (4. / 10.),
+            target_voltage: f64::from(self.read_ram_with_retires(PlRamAddress::Vreg).await?)
+                * (4. / 10.),
+            duty_cycle: f64::from(self.read_ram_with_retires(PlRamAddress::Dutycyc).await?) / 255.,
+            internal_charge_current: f64::from(
+                self.read_ram_with_retires(PlRamAddress::Cint).await?,
+            ) * (4. / 10.),
+            internal_load_current: f64::from(self.read_ram_with_retires(PlRamAddress::Lint).await?)
+                * (2. / 10.),
+            battery_temp: f64::from(self.read_ram_with_retires(PlRamAddress::Battemp).await?),
+            regulator_state: self
+                .read_ram_with_retires(PlRamAddress::Rstate)
+                .await?
+                .into(),
+            // internal_charge_ah_accumulator,
+            // external_charge_ah_accumulator,
+            // internal_load_ah_accumulator,
+            // external_load_ah_accumulator,
+            // internal_charge_ah,
+            // external_charge_ah,
+            // internal_load_ah,
+            // external_load_ah,
+        })
+    }
+
+    async fn send_command(&mut self, req: [u8; 4]) -> eyre::Result<()> {
+        self.flush()?;
+        self.port.write_all(&req).await?;
+        Ok(())
+    }
+
+    fn flush(&self) -> eyre::Result<()> {
+        self.port.clear(tokio_serial::ClearBuffer::All)?;
+        Ok(())
+    }
+
+    async fn receive<const LENGTH: usize>(&mut self) -> eyre::Result<[u8; LENGTH]> {
+        let mut buf = [0; LENGTH];
+        self.port.read_exact(&mut buf).await?;
+        Ok(buf)
+    }
+
+    async fn read_ram_with_retires<T>(&mut self, address: T) -> eyre::Result<u8>
+    where
+        T: Into<u8>,
+    {
+        const READ_TRIES: usize = 3;
+        let address: u8 = address.into();
+
+        let mut last_err = None;
+        for _ in 0..READ_TRIES {
+            match self.read_ram_single(address).await {
+                Ok(v) => return Ok(v),
+                Err(e) => last_err = Some(e),
+            }
+        }
+
+        Err(last_err.unwrap_or_else(|| {
+            eyre::eyre!(
+                "no error was stored in read_ram_with_retries: this should be unreachable??"
+            )
+        }))
+    }
+
+    async fn read_ram_single<T>(&mut self, address: T) -> eyre::Result<u8>
+    where
+        T: Into<u8>,
+    {
+        self.send_command(command(20, address.into(), 0)).await?;
+        let response = self.get_response().await?;
+        match response {
+            Ok(()) => Ok(self.receive::<1>().await?[0]),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    async fn write_ram<T>(&mut self, address: T, data: u8) -> eyre::Result<()>
+    where
+        T: Into<u8>,
+    {
+        self.send_command(command(152, address.into(), data))
+            .await?;
+        Ok(())
+    }
+
+    async fn read_eeprom<T>(&mut self, address: T) -> eyre::Result<u8>
+    where
+        T: Into<u8>,
+    {
+        self.send_command(command(72, address.into(), 0)).await?;
+
+        let response = self.get_response().await?;
+        match response {
+            Ok(()) => Ok(self.receive::<1>().await?[0]),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    async fn get_response(&mut self) -> eyre::Result<Result<(), PlError>> {
+        let res = self.receive::<1>().await?[0];
+        Ok(PlError::parse(res))
+    }
+}
+
+#[derive(thiserror::Error, Debug)]
+enum PlError {
+    #[error("No comms or corrupt comms")]
+    NoComms,
+    #[error("Loopback response code")]
+    Loopback,
+    #[error("Timeout error")]
+    Timeout,
+    #[error("Checksum error in PLI receive data.")]
+    Checksum,
+    #[error("Command received by PLI is not recognised.")]
+    CommandNotRecognised,
+    #[error("Unused - or could be returning PL40 version!")]
+    Unused1,
+    #[error("Processor did not receive a reply to request.")]
+    NoReply,
+    #[error("Error in reply from PL.")]
+    ErrorFromPl,
+    #[error("<not used> #2")]
+    Unused2,
+    #[error("<not used> #3")]
+    Unused3,
+    #[error("Unknown: {0:#X?}")]
+    Unknown(u8),
+}
+
+impl PlError {
+    const fn parse(value: u8) -> Result<(), Self> {
+        match value {
+            200 => Ok(()),
+            5 => Err(Self::NoComms),
+            128 => Err(Self::Loopback),
+            129 => Err(Self::Timeout),
+            130 => Err(Self::Checksum),
+            131 => Err(Self::CommandNotRecognised),
+            132 => Err(Self::Unused1),
+            133 => Err(Self::NoReply),
+            134 => Err(Self::ErrorFromPl),
+            135 => Err(Self::Unused2),
+            136 => Err(Self::Unused3),
+            v => Err(Self::Unknown(v)),
+        }
+    }
+}
+
+#[allow(dead_code)]
+enum PlRamAddress {
+    Dutycyc,
+    Sec,
+    Min,
+    Hour,
+    Batv,
+    Battemp,
+    Rstate,
+    Vreg,
+    Cint,
+    Lint,
+    Ciacc1,
+    Ciacc2,
+    Ciacc3,
+    Ciahl,
+    Ciahh,
+    Ceacc1,
+    Ceacc2,
+    Ceacc3,
+    Ceahl,
+    Ceahh,
+    Liacc1,
+    Liacc2,
+    Liacc3,
+    Liahl,
+    Liahh,
+    Leacc1,
+    Leacc2,
+    Leacc3,
+    Leahl,
+    Leahh,
+}
+
+impl From<PlRamAddress> for u8 {
+    fn from(value: PlRamAddress) -> Self {
+        match value {
+            PlRamAddress::Dutycyc => 39,
+            PlRamAddress::Sec => 46,
+            PlRamAddress::Min => 47,
+            PlRamAddress::Hour => 48,
+            PlRamAddress::Batv => 50,
+            PlRamAddress::Battemp => 52,
+            PlRamAddress::Rstate => 101,
+            PlRamAddress::Vreg => 105,
+            PlRamAddress::Cint => 213,
+            PlRamAddress::Lint => 217,
+            PlRamAddress::Ciacc1 => 0xB9,
+            PlRamAddress::Ciacc2 => 0xBA,
+            PlRamAddress::Ciacc3 => 0xBB,
+            PlRamAddress::Ciahl => 0xBC,
+            PlRamAddress::Ciahh => 0xBD,
+            PlRamAddress::Ceacc1 => 0xBE,
+            PlRamAddress::Ceacc2 => 0xBF,
+            PlRamAddress::Ceacc3 => 0xC0,
+            PlRamAddress::Ceahl => 0xC1,
+            PlRamAddress::Ceahh => 0xC2,
+            PlRamAddress::Liacc1 => 0xC3,
+            PlRamAddress::Liacc2 => 0xC4,
+            PlRamAddress::Liacc3 => 0xC5,
+            PlRamAddress::Liahl => 0xC6,
+            PlRamAddress::Liahh => 0xC7,
+            PlRamAddress::Leacc1 => 0xC8,
+            PlRamAddress::Leacc2 => 0xC9,
+            PlRamAddress::Leacc3 => 0xCA,
+            PlRamAddress::Leahl => 0xCB,
+            PlRamAddress::Leahh => 0xCC,
+        }
+    }
+}
+
+#[allow(dead_code)]
+enum PlEepromAddress {
+    // calibration
+    BCals,
+    BCal12,
+    BCal24,
+    BCal48,
+    ChargeOffset,
+    ChargeGain,
+    LoadOffset,
+    LoadGain,
+    BatTmpOffset,
+    BatTmpGain,
+    SolarOffset,
+    SolarGain,
+    BatsenOffset,
+    BatsenGain,
+
+    // settings
+    GOn,
+    GOff,
+    GDel,
+    GExF,
+    GRun,
+    LOff,
+    LOn,
+    LDel,
+    ASet,
+    BstFreq,
+    ATim,
+    Hyst,
+    BRet,
+    CurLim,
+    Bat2,
+    ESet1,
+    ESet2,
+    ESet3,
+    EqFreq,
+    ETim,
+    AbsV,
+    EMax,
+    FltV,
+    BMax,
+    LGSet,
+    PwmE,
+    SStop,
+    EtMod,
+    GMod,
+    Volt,
+    BCap,
+    HistoryDataPtr,
+}
+
+impl From<PlEepromAddress> for u8 {
+    fn from(value: PlEepromAddress) -> Self {
+        match value {
+            PlEepromAddress::BCals => 0x00,
+            PlEepromAddress::BCal12 => 0x01,
+            PlEepromAddress::BCal24 => 0x02,
+            PlEepromAddress::BCal48 => 0x03,
+            PlEepromAddress::ChargeOffset => 0x04,
+            PlEepromAddress::ChargeGain => 0x05,
+            PlEepromAddress::LoadOffset => 0x06,
+            PlEepromAddress::LoadGain => 0x07,
+            PlEepromAddress::BatTmpOffset => 0x08,
+            PlEepromAddress::BatTmpGain => 0x09,
+            PlEepromAddress::SolarOffset => 0x0A,
+            PlEepromAddress::SolarGain => 0x0B,
+            PlEepromAddress::BatsenOffset => 0x0C,
+            PlEepromAddress::BatsenGain => 0x0D,
+            PlEepromAddress::GOn => 0x0E,
+            PlEepromAddress::GOff => 0x0F,
+            PlEepromAddress::GDel => 0x10,
+            PlEepromAddress::GExF => 0x11,
+            PlEepromAddress::GRun => 0x12,
+            PlEepromAddress::LOff => 0x13,
+            PlEepromAddress::LOn => 0x14,
+            PlEepromAddress::LDel => 0x15,
+            PlEepromAddress::ASet => 0x16,
+            PlEepromAddress::BstFreq => 0x17,
+            PlEepromAddress::ATim => 0x18,
+            PlEepromAddress::Hyst => 0x19,
+            PlEepromAddress::BRet => 0x1A,
+            PlEepromAddress::CurLim => 0x1B,
+            PlEepromAddress::Bat2 => 0x1C,
+            PlEepromAddress::ESet1 => 0x1D,
+            PlEepromAddress::ESet2 => 0x1E,
+            PlEepromAddress::ESet3 => 0x1F,
+            PlEepromAddress::EqFreq => 0x20,
+            PlEepromAddress::ETim => 0x21,
+            PlEepromAddress::AbsV => 0x22,
+            PlEepromAddress::EMax => 0x23,
+            PlEepromAddress::FltV => 0x24,
+            PlEepromAddress::BMax => 0x25,
+            PlEepromAddress::LGSet => 0x26,
+            PlEepromAddress::PwmE => 0x27,
+            PlEepromAddress::SStop => 0x28,
+            PlEepromAddress::EtMod => 0x29,
+            PlEepromAddress::GMod => 0x2A,
+            PlEepromAddress::Volt => 0x2B,
+            PlEepromAddress::BCap => 0x2c,
+            PlEepromAddress::HistoryDataPtr => 0x2d,
+        }
+    }
+}
+
+const fn command(operation: u8, address: u8, data: u8) -> [u8; 4] {
+    [operation, address, data, !operation]
+}

charge-controller-supervisor/src/controller/tristar/modbus_wrapper.rs

@@ -0,0 +1,192 @@
+pub struct ModbusTimeout {
+    context: Option<tokio_modbus::client::Context>,
+    transport_settings: crate::config::Transport,
+    counters: Counters,
+}
+
+const MODBUS_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(3);
+
+async fn connect(
+    transport_settings: &crate::config::Transport,
+) -> eyre::Result<tokio_modbus::client::Context> {
+    let slave = tokio_modbus::Slave(super::DEVICE_ID);
+
+    let modbus = match transport_settings {
+        crate::config::Transport::Serial { port, baud_rate } => {
+            let modbus_serial =
+                tokio_serial::SerialStream::open(&tokio_serial::new(port, *baud_rate))?;
+            tokio_modbus::client::rtu::attach_slave(modbus_serial, slave)
+        }
+        crate::config::Transport::Tcp { ip, port } => {
+            let modbus_tcp = tokio::net::TcpStream::connect((*ip, *port)).await?;
+            tokio_modbus::client::tcp::attach_slave(modbus_tcp, slave)
+        }
+    };
+
+    Ok(modbus)
+}
+
+type ModbusDeviceResult<T> = Result<T, tokio_modbus::ExceptionCode>;
+type ModbusResult<T> = Result<ModbusDeviceResult<T>, tokio_modbus::Error>;
+
+type ContextFuture<'a, R> = dyn std::future::Future<Output = ModbusResult<R>> + Send + 'a;
+type ContextFn<R, D> =
+    fn(&mut tokio_modbus::client::Context, D) -> std::pin::Pin<Box<ContextFuture<'_, R>>>;
+
+trait TryInsert {
+    type T;
+    async fn get_or_try_insert_with<F, R, Fut>(&mut self, f: F) -> Result<&mut Self::T, R>
+    where
+        Fut: std::future::Future<Output = Result<Self::T, R>>,
+        F: FnOnce() -> Fut;
+}
+
+impl<T> TryInsert for Option<T> {
+    type T = T;
+
+    async fn get_or_try_insert_with<F, R, Fut>(&mut self, f: F) -> Result<&mut Self::T, R>
+    where
+        Fut: std::future::Future<Output = Result<Self::T, R>>,
+        F: FnOnce() -> Fut,
+    {
+        if self.is_none() {
+            let got = f().await?;
+            *self = Some(got);
+        }
+
+        // a `None` variant for `self` would have been replaced by a `Some` variant
+        // in the code above, or the ? would have caused an early return
+        Ok(self.as_mut().unwrap())
+    }
+}
+
+#[derive(Default, Debug)]
+struct Counters {
+    gateway: usize,
+    timeout: usize,
+    protocol: usize,
+}
+
+const MAX_ERRORS: usize = 2;
+
+impl Counters {
+    fn reset(&mut self) {
+        *self = Self::default();
+    }
+
+    const fn any_above_max(&self) -> bool {
+        self.gateway > MAX_ERRORS || self.timeout > MAX_ERRORS || self.protocol > MAX_ERRORS
+    }
+}
+
+const NUM_TRIES: usize = 3;
+
+impl ModbusTimeout {
+    pub async fn new(transport_settings: crate::config::Transport) -> eyre::Result<Self> {
+        let context = Some(connect(&transport_settings).await?);
+        Ok(Self {
+            context,
+            transport_settings,
+            counters: Counters::default(),
+        })
+    }
+
+    async fn with_context<R, D: Copy>(
+        &mut self,
+        f: ContextFn<R, D>,
+        data: D,
+    ) -> eyre::Result<Result<R, tokio_modbus::ExceptionCode>> {
+        let mut last_err = None;
+        for _ in 0..NUM_TRIES {
+            if let Ok(context) = self
+                .context
+                .get_or_try_insert_with(async || connect(&self.transport_settings).await)
+                .await
+            {
+                let res = tokio::time::timeout(MODBUS_TIMEOUT, f(context, data)).await;
+                match res {
+                    Ok(Ok(Err(e)))
+                        if e == tokio_modbus::ExceptionCode::GatewayTargetDevice
+                            || e == tokio_modbus::ExceptionCode::GatewayPathUnavailable =>
+                    {
+                        log::warn!("gateway error: {e:?}");
+                        last_err = Some(e.into());
+                        self.counters.gateway += 1;
+                    }
+                    Ok(Ok(v)) => {
+                        self.counters.reset();
+                        return Ok(v);
+                    }
+                    Ok(Err(tokio_modbus::Error::Protocol(e))) => {
+                        // protocol error
+                        log::warn!("protocol error: {e:?}");
+                        last_err = Some(e.into());
+                        self.counters.protocol += 1;
+                    }
+                    Ok(Err(tokio_modbus::Error::Transport(e))) => {
+                        // transport error
+                        log::warn!("reconnecting due to transport error: {e:?}");
+                        last_err = Some(e.into());
+                        self.context = None;
+                    }
+                    Err(_) => {
+                        // timeout
+                        last_err = Some(eyre::eyre!("timeout"));
+                        self.counters.timeout += 1;
+                    }
+                }
+                if self.counters.any_above_max() {
+                    self.context = None;
+                    log::warn!(
+                        "reconnecting due to multiple errors without a successful operation: {:?}",
+                        self.counters
+                    );
+                    self.counters.reset();
+                }
+            } else {
+                // failed to reconnect
+                return Err(eyre::eyre!("failed to reconnect to controller"));
+            }
+        }
+
+        Err(last_err.unwrap_or_else(|| eyre::eyre!("unknown last error????")))
+    }
+
+    pub async fn write_single_register(
+        &mut self,
+        addr: tokio_modbus::Address,
+        word: u16,
+    ) -> eyre::Result<ModbusDeviceResult<()>> {
+        async fn write(
+            context: &mut tokio_modbus::client::Context,
+            addr: tokio_modbus::Address,
+            word: u16,
+        ) -> ModbusResult<()> {
+            use tokio_modbus::client::Writer;
+            context.write_single_register(addr, word).await
+        }
+
+        let fut: ContextFn<(), _> = |context, (addr, word)| Box::pin(write(context, addr, word));
+        let r = self.with_context(fut, (addr, word)).await?;
+        Ok(r)
+    }
+
+    pub async fn read_holding_registers(
+        &mut self,
+        addr: tokio_modbus::Address,
+        cnt: tokio_modbus::Quantity,
+    ) -> eyre::Result<ModbusDeviceResult<Vec<u16>>> {
+        async fn read(
+            context: &mut tokio_modbus::client::Context,
+            addr: tokio_modbus::Address,
+            cnt: tokio_modbus::Quantity,
+        ) -> ModbusResult<Vec<u16>> {
+            use tokio_modbus::client::Reader;
+            context.read_holding_registers(addr, cnt).await
+        }
+
+        let fut: ContextFn<_, _> = |context, (addr, cnt)| Box::pin(read(context, addr, cnt));
+        let res = self.with_context(fut, (addr, cnt)).await?;
+        Ok(res)
+    }
+}

charge-controller-supervisor/src/gauges.rs

@@ -41,6 +41,8 @@ lazy_static! {
         &[PL_LABEL]
     )
     .unwrap();
+    pub static ref HEATSINK_TEMP: GaugeVec =
+        register_gauge_vec!("heatsink_temp", "Heatsink temperature", &[TRISTAR_LABEL]).unwrap();
     pub static ref TRISTAR_INPUT_VOLTAGE: GaugeVec =
         register_gauge_vec!("tristar_input_voltage", "Input voltage", &[TRISTAR_LABEL]).unwrap();
     pub static ref TRISTAR_CHARGE_CURRENT: GaugeVec =
@@ -67,4 +69,16 @@ lazy_static! {
         &[TRISTAR_LABEL]
     )
     .unwrap();
+    pub static ref TRISTAR_TOTAL_AH_CHARGE_DAILY: GaugeVec = register_gauge_vec!(
+        "tristar_total_ah_charge_daily",
+        "Total charge daily (Ah)",
+        &[TRISTAR_LABEL]
+    )
+    .unwrap();
+    pub static ref TRISTAR_TOTAL_WH_CHARGE_DAILY: GaugeVec = register_gauge_vec!(
+        "tristar_total_wh_charge_daily",
+        "Total charge daily (Wh)",
+        &[TRISTAR_LABEL]
+    )
+    .unwrap();
 }

charge-controller-supervisor/src/main.rs

@@ -1,3 +1,5 @@
+#![feature(let_chains)]
+
 use clap::Parser;
 use futures::StreamExt;
 use std::path::PathBuf;
@@ -23,8 +25,8 @@ enum Commands {
 
 mod controller;
 mod gauges;
-mod pl;
-mod tristar;
+
+mod storage;
 
 mod web;
 
@@ -57,7 +59,32 @@ async fn run() -> eyre::Result<()> {
     match args.command {
         Commands::Watch => watch(args).await,
         Commands::GenerateConfig => {
-            let config = config::Config::default();
+            let mut config = config::Config::default();
+            config
+                .charge_controllers
+                .push(config::ChargeControllerConfig {
+                    name: String::from("tcp"),
+                    transport: config::Transport::Tcp {
+                        ip: std::net::IpAddr::V4(std::net::Ipv4Addr::new(192, 168, 1, 102)),
+                        port: 420,
+                    },
+                    watch_interval_seconds: 0,
+                    variant: config::ChargeControllerVariant::Tristar,
+                    follow_primary: false,
+                });
+            config
+                .charge_controllers
+                .push(config::ChargeControllerConfig {
+                    name: String::from("serial"),
+                    transport: config::Transport::Serial {
+                        port: "/dev/someport".to_string(),
+                        baud_rate: 69,
+                    },
+                    watch_interval_seconds: 0,
+                    variant: config::ChargeControllerVariant::Tristar,
+                    follow_primary: false,
+                });
+            let config = config::ConfigStorage::from_latest(config);
             let json = serde_json::to_string_pretty(&config)?;
             println!("{json}");
             Ok(())
@@ -66,31 +93,70 @@ async fn run() -> eyre::Result<()> {
 }
 
 async fn watch(args: Args) -> eyre::Result<()> {
-    let config: config::Config = serde_json::from_reader(std::fs::File::open(args.config)?)?;
+    let _w = config::init_config(&args.config);
+    let (storage, follow_voltage_tx, mut controller_tasks) = {
+        let config = config::access_config().await;
+        if config
+            .charge_controllers
+            .iter()
+            .any(|cc| cc.follow_primary && cc.name == config.primary_charge_controller)
+        {
+            return Err(eyre::eyre!(
+                "primary charge controller is set to follow primary!"
+            ));
+        }
 
-    let mut controllers = futures::stream::FuturesUnordered::new();
+        let mut controllers = Vec::new();
         let mut map = std::collections::HashMap::new();
 
-    for config in config.charge_controllers {
+        let (voltage_tx, voltage_rx) =
+            tokio::sync::watch::channel(controller::VoltageCommand::None);
+
+        for config in &config.charge_controllers {
             let n = config.name.clone();
-        match controller::Controller::new(config) {
+            match controller::Controller::new(config.clone(), voltage_rx.clone()).await {
                 Ok(v) => {
                     map.insert(n, v.get_data_ptr());
-                controllers.push(run_loop(v));
+                    controllers.push(v);
                 }
                 Err(e) => log::error!("couldn't connect to {}: {e:?}", n),
             }
         }
 
-    let server = web::rocket(web::ServerState::new(map));
+        if let Some(primary) = controllers
+            .iter_mut()
+            .find(|c| c.name() == config.primary_charge_controller)
+        {
+            primary.set_tx_to_secondary(voltage_tx.clone());
+        }
+
+        drop(config);
+
+        let controller_tasks = futures::stream::FuturesUnordered::new();
+        for controller in controllers {
+            controller_tasks.push(run_loop(controller));
+        }
+
+        (
+            storage::AllControllers::new(map),
+            voltage_tx,
+            controller_tasks,
+        )
+    };
+
+    let server = web::rocket(web::ServerState::new(
+        &config::access_config().await.primary_charge_controller,
+        storage,
+        follow_voltage_tx,
+    ));
     let server_task = tokio::task::spawn(server.launch());
+    log::warn!("...started!");
 
     tokio::select! {
-        v = controllers.next() => {
+        v = controller_tasks.next() => {
             match v {
                 Some(Err(e)) => {
                     log::error!("{e:?}");
-                    std::process::exit(1);
                 }
                 _ => {
                     log::error!("no controller tasks left???");
@@ -98,7 +164,12 @@ async fn watch(args: Args) -> eyre::Result<()> {
             }
         }
         v = server_task => {
-            log::error!("server exited: {v:#?}");
+            if let Err(e)=v {
+                log::error!("server exited: {e:#?}");
+                std::process::exit(1);
+            } else {
+                std::process::exit(0);
+            }
         }
     }
 
@@ -107,10 +178,26 @@ async fn watch(args: Args) -> eyre::Result<()> {
 
 async fn run_loop(mut controller: controller::Controller) -> eyre::Result<()> {
     let mut timeout = tokio::time::interval(controller.timeout_interval());
+    timeout.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay);
+
     loop {
-        timeout.tick().await;
+        let rx = controller.get_rx();
+        tokio::select! {
+            _ = timeout.tick() => {
+                do_refresh(&mut controller).await;
+            }
+            Ok(()) = rx.changed() => {
+                let command = *rx.borrow();
+                if let Err(e) = controller.process_command(command).await {
+                    log::error!("controller {} failed to process command: {e}", controller.name());
+                }
+            }
+        }
+    }
+}
+
+async fn do_refresh(controller: &mut controller::Controller) {
     if let Err(e) = controller.refresh().await {
         log::warn!("error reading controller {}: {e:?}", controller.name());
     }
 }
-}

charge-controller-supervisor/src/pl.rs

@@ -1,283 +0,0 @@
-use chrono::Timelike;
-use serde::{Deserialize, Serialize};
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
-use tokio_serial::{SerialPort, SerialPortBuilderExt};
-
-use crate::gauges::{
-    BATTERY_TEMP, BATTERY_VOLTAGE, CHARGE_STATE, INPUT_CURRENT, PL_DUTY_CYCLE, PL_LOAD_CURRENT,
-    TARGET_VOLTAGE,
-};
-
-pub struct Pli {
-    friendly_name: String,
-    port: tokio_serial::SerialStream,
-}
-
-#[derive(Debug, Clone, Copy, Serialize, Deserialize, Default)]
-pub struct PlState {
-    pub battery_voltage: f64,
-    pub target_voltage: f64,
-    pub duty_cycle: f64,
-    pub internal_charge_current: f64,
-    pub internal_load_current: f64,
-    pub battery_temp: f64,
-    pub regulator_state: RegulatorState,
-}
-
-#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
-pub enum RegulatorState {
-    Boost,
-    Equalise,
-    Absorption,
-    Float,
-}
-
-impl From<u8> for RegulatorState {
-    fn from(value: u8) -> Self {
-        match value & 0b11 {
-            0b00 => Self::Boost,
-            0b01 => Self::Equalise,
-            0b10 => Self::Absorption,
-            0b11 => Self::Float,
-            _ => unreachable!(),
-        }
-    }
-}
-
-impl From<RegulatorState> for u8 {
-    fn from(value: RegulatorState) -> Self {
-        match value {
-            RegulatorState::Boost => 0b00,
-            RegulatorState::Equalise => 0b01,
-            RegulatorState::Absorption => 0b10,
-            RegulatorState::Float => 0b11,
-        }
-    }
-}
-
-impl Default for RegulatorState {
-    fn default() -> Self {
-        Self::Absorption
-    }
-}
-
-fn set_regulator_gauges(state: RegulatorState, label: &str) {
-    let boost = CHARGE_STATE.with_label_values(&[label, "boost"]);
-    let equalise = CHARGE_STATE.with_label_values(&[label, "equalise"]);
-    let absorption = CHARGE_STATE.with_label_values(&[label, "absorption"]);
-    let float = CHARGE_STATE.with_label_values(&[label, "float"]);
-
-    match state {
-        RegulatorState::Boost => {
-            boost.set(1);
-            equalise.set(0);
-            absorption.set(0);
-            float.set(0);
-        }
-        RegulatorState::Equalise => {
-            boost.set(0);
-            equalise.set(1);
-            absorption.set(0);
-            float.set(0);
-        }
-        RegulatorState::Absorption => {
-            boost.set(0);
-            equalise.set(0);
-            absorption.set(1);
-            float.set(0);
-        }
-        RegulatorState::Float => {
-            boost.set(0);
-            equalise.set(0);
-            absorption.set(0);
-            float.set(1);
-        }
-    }
-}
-
-#[expect(dead_code, reason = "writing settings is not yet implemented")]
-#[derive(Debug, Clone, Copy)]
-pub enum PliRequest {
-    ReadRam(u8),
-    ReadEeprom(u8),
-    SyncTime,
-    SetRegulatorState(RegulatorState),
-}
-
-impl Pli {
-    pub fn new(
-        serial_port: &str,
-        friendly_name: &str,
-        baud_rate: u32,
-        timeout: u64,
-    ) -> Result<Self, tokio_serial::Error> {
-        let port = tokio_serial::new(serial_port, baud_rate)
-            .timeout(std::time::Duration::from_millis(timeout))
-            .open_native_async()?;
-
-        Ok(Self {
-            friendly_name: friendly_name.to_owned(),
-            port,
-        })
-    }
-
-    pub async fn refresh(&mut self) -> eyre::Result<crate::controller::CommonData> {
-        let new_state = self.read_state().await?;
-        BATTERY_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.battery_voltage);
-        TARGET_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.target_voltage);
-        PL_DUTY_CYCLE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.duty_cycle);
-        INPUT_CURRENT
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.internal_charge_current);
-        PL_LOAD_CURRENT
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.internal_load_current);
-        BATTERY_TEMP
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.battery_temp);
-
-        set_regulator_gauges(new_state.regulator_state, &self.friendly_name);
-
-        Ok(crate::controller::CommonData {
-            battery_voltage: new_state.battery_voltage,
-            target_voltage: new_state.target_voltage,
-            battery_temp: new_state.battery_temp,
-        })
-    }
-
-    #[expect(dead_code, reason = "writing settings is not yet implemented")]
-    pub async fn process_request(&mut self, message: PliRequest) -> eyre::Result<()> {
-        match message {
-            PliRequest::ReadRam(address) => {
-                let data = self.read_ram(address).await?;
-                log::warn!("Read RAM at {address}: data {data}");
-            }
-            PliRequest::ReadEeprom(address) => {
-                let data = self.read_eeprom(address).await?;
-                log::warn!("Read EEPROM at {address}: data {data}");
-            }
-            PliRequest::SyncTime => {
-                let now = chrono::Local::now();
-                let timestamp = (((now.hour() * 10) + (now.minute() / 6)) & 0xFF) as u8;
-                let min = (now.minute() % 6) as u8;
-                let sec = (now.second() / 2).min(29) as u8;
-                self.write_ram(PlRamAddress::Hour, timestamp).await?;
-                self.write_ram(PlRamAddress::Min, min).await?;
-                self.write_ram(PlRamAddress::Sec, sec).await?;
-                log::warn!(
-                    "Set time: {now} corresponds to {timestamp} + minutes {min} + seconds {sec}"
-                );
-            }
-            PliRequest::SetRegulatorState(state) => {
-                log::warn!("Setting regulator state to {state:?}");
-                self.write_ram(PlRamAddress::Rstate, state.into()).await?;
-            }
-        }
-        Ok(())
-    }
-
-    async fn read_state(&mut self) -> eyre::Result<PlState> {
-        Ok(PlState {
-            battery_voltage: f64::from(self.read_ram(PlRamAddress::Batv).await?) * (4. / 10.),
-            target_voltage: f64::from(self.read_ram(PlRamAddress::Vreg).await?) * (4. / 10.),
-            duty_cycle: f64::from(self.read_ram(PlRamAddress::Dutycyc).await?) / 255.,
-            internal_charge_current: f64::from(self.read_ram(PlRamAddress::Cint).await?)
-                * (4. / 10.),
-            internal_load_current: f64::from(self.read_ram(PlRamAddress::Lint).await?) * (4. / 10.),
-            battery_temp: f64::from(self.read_ram(PlRamAddress::Battemp).await?),
-            regulator_state: self.read_ram(PlRamAddress::Rstate).await?.into(),
-        })
-    }
-
-    async fn send_command(&mut self, req: [u8; 4]) -> eyre::Result<()> {
-        self.flush()?;
-        self.port.write_all(&req).await?;
-        Ok(())
-    }
-
-    fn flush(&mut self) -> eyre::Result<()> {
-        self.port.clear(tokio_serial::ClearBuffer::All)?;
-        Ok(())
-    }
-
-    async fn receive<const LENGTH: usize>(&mut self) -> eyre::Result<[u8; LENGTH]> {
-        let mut buf = [0; LENGTH];
-        self.port.read_exact(&mut buf).await?;
-        Ok(buf)
-    }
-
-    async fn read_ram<T>(&mut self, address: T) -> eyre::Result<u8>
-    where
-        T: Into<u8>,
-    {
-        self.send_command(command(20, address.into(), 0)).await?;
-        let buf = self.receive::<1>().await?;
-        if buf[0] == 200 {
-            Ok(self.receive::<1>().await?[0])
-        } else {
-            Err(eyre::eyre!("read error: result is {}", buf[0]))
-        }
-    }
-
-    async fn write_ram<T>(&mut self, address: T, data: u8) -> eyre::Result<()>
-    where
-        T: Into<u8>,
-    {
-        self.send_command(command(152, address.into(), data))
-            .await?;
-        Ok(())
-    }
-
-    async fn read_eeprom<T>(&mut self, address: T) -> eyre::Result<u8>
-    where
-        T: Into<u8>,
-    {
-        self.send_command(command(72, address.into(), 0)).await?;
-        let buf = self.receive::<1>().await?;
-        if buf[0] == 200 {
-            Ok(self.receive::<1>().await?[0])
-        } else {
-            Err(eyre::eyre!("read error: result is {}", buf[0]))
-        }
-    }
-}
-
-enum PlRamAddress {
-    Dutycyc,
-    Sec,
-    Min,
-    Hour,
-    Batv,
-    Battemp,
-    Rstate,
-    Vreg,
-    Cint,
-    Lint,
-}
-
-impl From<PlRamAddress> for u8 {
-    fn from(value: PlRamAddress) -> Self {
-        match value {
-            PlRamAddress::Dutycyc => 39,
-            PlRamAddress::Sec => 46,
-            PlRamAddress::Min => 47,
-            PlRamAddress::Hour => 48,
-            PlRamAddress::Batv => 50,
-            PlRamAddress::Battemp => 52,
-            PlRamAddress::Rstate => 101,
-            PlRamAddress::Vreg => 105,
-            PlRamAddress::Cint => 213,
-            PlRamAddress::Lint => 217,
-        }
-    }
-}
-
-fn command(operation: u8, address: u8, data: u8) -> [u8; 4] {
-    [operation, address, data, !operation]
-}

charge-controller-supervisor/src/storage.rs

@@ -0,0 +1,61 @@
+pub struct AllControllers {
+    map: std::collections::HashMap<String, std::sync::Arc<ControllerData>>,
+}
+
+impl AllControllers {
+    pub const fn new(
+        map: std::collections::HashMap<String, std::sync::Arc<ControllerData>>,
+    ) -> Self {
+        Self { map }
+    }
+
+    pub fn controller_names(&self) -> impl Iterator<Item = &String> {
+        self.map.keys()
+    }
+
+    pub fn get(&self, name: &str) -> Option<&std::sync::Arc<ControllerData>> {
+        self.map.get(name)
+    }
+
+    pub fn all_data(&self) -> impl Iterator<Item = (&String, &std::sync::Arc<ControllerData>)> {
+        self.map.iter()
+    }
+}
+
+pub struct ControllerData {
+    state: tokio::sync::RwLock<Option<crate::controller::ControllerState>>,
+    settings: tokio::sync::RwLock<Option<crate::controller::ControllerSettings>>,
+}
+
+impl ControllerData {
+    pub const fn new() -> Self {
+        Self {
+            state: tokio::sync::RwLock::const_new(None),
+            settings: tokio::sync::RwLock::const_new(None),
+        }
+    }
+
+    pub async fn write_state(
+        &self,
+    ) -> tokio::sync::RwLockWriteGuard<Option<crate::controller::ControllerState>> {
+        self.state.write().await
+    }
+
+    pub async fn read_state(
+        &self,
+    ) -> tokio::sync::RwLockReadGuard<Option<crate::controller::ControllerState>> {
+        self.state.read().await
+    }
+
+    pub async fn write_settings(
+        &self,
+    ) -> tokio::sync::RwLockWriteGuard<Option<crate::controller::ControllerSettings>> {
+        self.settings.write().await
+    }
+
+    pub async fn read_settings(
+        &self,
+    ) -> tokio::sync::RwLockReadGuard<Option<crate::controller::ControllerSettings>> {
+        self.settings.read().await
+    }
+}

charge-controller-supervisor/src/tristar.rs

@@ -1,326 +0,0 @@
-use prometheus::core::{AtomicI64, GenericGauge};
-use tokio_modbus::client::Reader;
-
-use crate::gauges::{
-    BATTERY_TEMP, BATTERY_VOLTAGE, CHARGE_STATE, INPUT_CURRENT, TARGET_VOLTAGE,
-    TRISTAR_CHARGE_CURRENT, TRISTAR_INPUT_VOLTAGE, TRISTAR_MAX_ARRAY_POWER,
-    TRISTAR_MAX_ARRAY_VOLTAGE, TRISTAR_OPEN_CIRCUIT_VOLTAGE, TRISTAR_POWER_IN, TRISTAR_POWER_OUT,
-};
-
-const DEVICE_ID: u8 = 0x01;
-const RAM_DATA_SIZE: u16 = 0x005B;
-
-#[derive(Debug, Clone, Copy)]
-pub struct Scaling {
-    pub v_scale: f64,
-    pub i_scale: f64,
-}
-
-impl Scaling {
-    fn from(data: &[u16]) -> Self {
-        Self::from_internal(data[0], data[1], data[2], data[3])
-    }
-
-    fn from_internal(v_pu_hi: u16, v_pu_lo: u16, i_pu_hi: u16, i_pu_lo: u16) -> Self {
-        Self {
-            v_scale: f64::from(v_pu_hi) + (f64::from(v_pu_lo) / f64::powf(2., 16.)),
-            i_scale: f64::from(i_pu_hi) + (f64::from(i_pu_lo) / f64::powf(2., 16.)),
-        }
-    }
-
-    fn get_voltage(&self, data: u16) -> f64 {
-        f64::from(data) * self.v_scale * f64::powf(2., -15.)
-    }
-
-    fn get_current(&self, data: u16) -> f64 {
-        f64::from(data) * self.i_scale * f64::powf(2., -15.)
-    }
-
-    fn get_power(&self, data: u16) -> f64 {
-        f64::from(data) * self.v_scale * self.i_scale * f64::powf(2., -17.)
-    }
-}
-
-pub struct Tristar {
-    friendly_name: String,
-    modbus: tokio_modbus::client::Context,
-    charge_state_gauges: ChargeStateGauges,
-    consecutive_errors: usize,
-}
-
-#[derive(Default, Debug, Clone, Copy)]
-pub struct TristarState {
-    battery_voltage: f64,
-    target_voltage: f64,
-    input_current: f64,
-    battery_temp: u16,
-    charge_state: ChargeState,
-    tristar_input_voltage: f64,
-    tristar_charge_current: f64,
-    tristar_power_out: f64,
-    tristar_power_in: f64,
-    tristar_max_array_power: f64,
-    tristar_max_array_voltage: f64,
-    tristar_open_circuit_voltage: f64,
-}
-
-impl TristarState {
-    fn from_ram(ram: &[u16]) -> Self {
-        let scaling = Scaling::from(ram);
-        Self {
-            battery_voltage: scaling.get_voltage(ram[TristarRamAddress::AdcVbFMed]),
-            target_voltage: scaling.get_voltage(ram[TristarRamAddress::VbRef]),
-            input_current: scaling.get_current(ram[TristarRamAddress::AdcIaFShadow]),
-            battery_temp: ram[TristarRamAddress::Tbatt],
-            charge_state: ChargeState::from(ram[TristarRamAddress::ChargeState]),
-            tristar_input_voltage: scaling.get_voltage(ram[TristarRamAddress::AdcVaF]),
-            tristar_charge_current: scaling.get_current(ram[TristarRamAddress::AdcIbFShadow]),
-            tristar_power_out: scaling.get_power(ram[TristarRamAddress::PowerOutShadow]),
-            tristar_power_in: scaling.get_power(ram[TristarRamAddress::PowerInShadow]),
-            tristar_max_array_power: scaling.get_power(ram[TristarRamAddress::SweepPinMax]),
-            tristar_max_array_voltage: scaling.get_voltage(ram[TristarRamAddress::SweepVmp]),
-            tristar_open_circuit_voltage: scaling.get_voltage(ram[TristarRamAddress::SweepVoc]),
-        }
-    }
-}
-
-#[derive(Debug, Clone, Copy)]
-enum ChargeState {
-    Start,
-    NightCheck,
-    Disconnect,
-    Night,
-    Fault,
-    Mppt,
-    Absorption,
-    Float,
-    Equalize,
-    Slave,
-    Unknown,
-}
-
-impl Default for ChargeState {
-    fn default() -> Self {
-        Self::Unknown
-    }
-}
-
-impl From<u16> for ChargeState {
-    fn from(value: u16) -> Self {
-        match value {
-            0 => Self::Start,
-            1 => Self::NightCheck,
-            2 => Self::Disconnect,
-            3 => Self::Night,
-            4 => Self::Fault,
-            5 => Self::Mppt,
-            6 => Self::Absorption,
-            7 => Self::Float,
-            8 => Self::Equalize,
-            9 => Self::Slave,
-            _ => {
-                log::warn!("Unknown chargestate value: {value}");
-                Self::Unknown
-            }
-        }
-    }
-}
-
-struct ChargeStateGauges {
-    start: GenericGauge<AtomicI64>,
-    night_check: GenericGauge<AtomicI64>,
-    disconnect: GenericGauge<AtomicI64>,
-    night: GenericGauge<AtomicI64>,
-    fault: GenericGauge<AtomicI64>,
-    mppt: GenericGauge<AtomicI64>,
-    absorption: GenericGauge<AtomicI64>,
-    float: GenericGauge<AtomicI64>,
-    equalize: GenericGauge<AtomicI64>,
-    slave: GenericGauge<AtomicI64>,
-    unknown: GenericGauge<AtomicI64>,
-}
-
-impl ChargeStateGauges {
-    fn new(label: &str) -> Self {
-        let start = CHARGE_STATE.with_label_values(&[label, "start"]);
-        let night_check = CHARGE_STATE.with_label_values(&[label, "night_check"]);
-        let disconnect = CHARGE_STATE.with_label_values(&[label, "disconnect"]);
-        let night = CHARGE_STATE.with_label_values(&[label, "night"]);
-        let fault = CHARGE_STATE.with_label_values(&[label, "fault"]);
-        let mppt = CHARGE_STATE.with_label_values(&[label, "mppt"]);
-        let absorption = CHARGE_STATE.with_label_values(&[label, "absorption"]);
-        let float = CHARGE_STATE.with_label_values(&[label, "float"]);
-        let equalize = CHARGE_STATE.with_label_values(&[label, "equalize"]);
-        let slave = CHARGE_STATE.with_label_values(&[label, "slave"]);
-        let unknown = CHARGE_STATE.with_label_values(&[label, "unknown"]);
-        Self {
-            start,
-            night_check,
-            disconnect,
-            night,
-            fault,
-            mppt,
-            absorption,
-            float,
-            equalize,
-            slave,
-            unknown,
-        }
-    }
-
-    fn zero_all(&mut self) {
-        self.start.set(0);
-        self.night_check.set(0);
-        self.disconnect.set(0);
-        self.night.set(0);
-        self.fault.set(0);
-        self.mppt.set(0);
-        self.absorption.set(0);
-        self.float.set(0);
-        self.equalize.set(0);
-        self.slave.set(0);
-        self.unknown.set(0);
-    }
-
-    fn set(&mut self, state: ChargeState) {
-        match state {
-            ChargeState::Start => {
-                self.zero_all();
-                self.start.set(1);
-            }
-            ChargeState::NightCheck => {
-                self.zero_all();
-                self.night_check.set(1);
-            }
-            ChargeState::Disconnect => {
-                self.zero_all();
-                self.disconnect.set(1);
-            }
-            ChargeState::Night => {
-                self.zero_all();
-                self.night.set(1);
-            }
-            ChargeState::Fault => {
-                self.zero_all();
-                self.fault.set(1);
-            }
-            ChargeState::Mppt => {
-                self.zero_all();
-                self.mppt.set(1);
-            }
-            ChargeState::Absorption => {
-                self.zero_all();
-                self.absorption.set(1);
-            }
-            ChargeState::Float => {
-                self.zero_all();
-                self.float.set(1);
-            }
-            ChargeState::Equalize => {
-                self.zero_all();
-                self.equalize.set(1);
-            }
-            ChargeState::Slave => {
-                self.zero_all();
-                self.slave.set(1);
-            }
-            ChargeState::Unknown => {
-                self.zero_all();
-                self.unknown.set(1);
-            }
-        }
-    }
-}
-
-impl Tristar {
-    pub fn new(serial_port: &str, friendly_name: &str, baud_rate: u32) -> eyre::Result<Self> {
-        let modbus_serial =
-            tokio_serial::SerialStream::open(&tokio_serial::new(serial_port, baud_rate))?;
-        let slave = tokio_modbus::Slave(DEVICE_ID);
-        let modbus = tokio_modbus::client::rtu::attach_slave(modbus_serial, slave);
-        let charge_state_gauges = ChargeStateGauges::new(friendly_name);
-        Ok(Self {
-            friendly_name: friendly_name.to_owned(),
-            modbus,
-            charge_state_gauges,
-            consecutive_errors: 0,
-        })
-    }
-
-    pub async fn refresh(&mut self) -> eyre::Result<crate::controller::CommonData> {
-        let new_state = self.get_data().await?;
-        self.consecutive_errors = 0;
-        BATTERY_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.battery_voltage);
-        TARGET_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.target_voltage);
-        INPUT_CURRENT
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.input_current);
-        BATTERY_TEMP
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.battery_temp.into());
-        TRISTAR_INPUT_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_input_voltage);
-        TRISTAR_CHARGE_CURRENT
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_charge_current);
-        TRISTAR_POWER_OUT
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_power_out);
-        TRISTAR_POWER_IN
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_power_in);
-        TRISTAR_MAX_ARRAY_POWER
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_max_array_power);
-        TRISTAR_MAX_ARRAY_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_max_array_voltage);
-        TRISTAR_OPEN_CIRCUIT_VOLTAGE
-            .with_label_values(&[&self.friendly_name])
-            .set(new_state.tristar_open_circuit_voltage);
-
-        self.charge_state_gauges.set(new_state.charge_state);
-
-        Ok(crate::controller::CommonData {
-            battery_voltage: new_state.battery_voltage,
-            target_voltage: new_state.target_voltage,
-            battery_temp: f64::from(new_state.battery_temp),
-        })
-    }
-
-    async fn get_data(&mut self) -> eyre::Result<TristarState> {
-        let data = self
-            .modbus
-            .read_holding_registers(0x0000, RAM_DATA_SIZE + 1)
-            .await??;
-        Ok(TristarState::from_ram(&data))
-    }
-}
-
-enum TristarRamAddress {
-    AdcVbFMed = 0x0018,
-    AdcVaF = 0x001B,
-    AdcIbFShadow = 0x001C,
-    AdcIaFShadow = 0x001D,
-    Tbatt = 0x0025,
-    ChargeState = 0x0032,
-    VbRef = 0x0033,
-    PowerOutShadow = 0x003A,
-    PowerInShadow = 0x003B,
-    SweepPinMax = 0x003C,
-    SweepVmp = 0x003D,
-    SweepVoc = 0x003E,
-}
-
-impl std::ops::Index<TristarRamAddress> for [u16] {
-    type Output = u16;
-
-    fn index(&self, index: TristarRamAddress) -> &Self::Output {
-        &self[index as usize]
-    }
-}

charge-controller-supervisor/src/web.rs

@@ -1,32 +1,83 @@
-use rocket::{get, routes, serde::json::Json, State};
+use rocket::{get, post, routes, serde::json::Json, State};
+
+use crate::storage::AllControllers;
+
+mod static_handler;
 
 pub struct ServerState {
-    map: std::collections::HashMap<
-        String,
-        std::sync::Arc<tokio::sync::RwLock<crate::controller::CommonData>>,
-    >,
+    primary_name: String,
+    data: AllControllers,
+    tx_to_controllers: tokio::sync::watch::Sender<crate::controller::VoltageCommand>,
 }
 
 impl ServerState {
     pub fn new(
-        map: std::collections::HashMap<
-            String,
-            std::sync::Arc<tokio::sync::RwLock<crate::controller::CommonData>>,
-        >,
+        primary_name: &impl ToString,
+        data: AllControllers,
+        tx_to_controllers: tokio::sync::watch::Sender<crate::controller::VoltageCommand>,
     ) -> Self {
-        Self { map }
+        let primary_name = primary_name.to_string();
+        Self {
+            primary_name,
+            data,
+            tx_to_controllers,
+        }
     }
 }
 
 pub fn rocket(state: ServerState) -> rocket::Rocket<rocket::Build> {
+    // serve the html from disk if running in a debug build
+    // this allows editing the webpage without having to rebuild the executable
+    // but in release builds, bundle the entire webapp folder into the exe
+    let fileserver: Vec<rocket::Route> = if cfg!(debug_assertions) {
+        rocket::fs::FileServer::from(format!(
+            "{}/webapp",
+            std::env::var("CARGO_MANIFEST_DIR").unwrap()
+        ))
+        .into()
+    } else {
+        static_handler::UiStatic {}.into()
+    };
     rocket::build()
+        .attach(Cors)
         .manage(state)
-        .mount("/", routes![metrics, interfaces, all_interfaces, interface])
+        .mount("/", fileserver)
+        .mount(
+            "/",
+            routes![
+                metrics,
+                interfaces,
+                all_interfaces,
+                all_interfaces_full,
+                all_interfaces_settings,
+                primary_interface,
+                interface,
+                interface_full,
+                interface_settings,
+                get_control,
+                enable_control,
+                disable_control
+            ],
+        )
 }
 
 #[get("/interfaces")]
 fn interfaces(state: &State<ServerState>) -> Json<Vec<String>> {
-    Json(state.map.keys().cloned().collect())
+    Json(state.data.controller_names().cloned().collect())
+}
+
+#[get("/interfaces/primary")]
+async fn primary_interface(
+    state: &State<ServerState>,
+) -> Result<Json<crate::controller::CommonData>, ServerError> {
+    let s = state
+        .data
+        .get(&state.primary_name)
+        .ok_or(ServerError::InvalidPrimaryName)?
+        .read_state()
+        .await;
+
+    Ok(Json(s.as_ref().ok_or(ServerError::NoData)?.common()))
 }
 
 #[get("/interfaces/data")]
@@ -35,8 +86,43 @@ async fn all_interfaces(
 ) -> Json<Vec<(String, crate::controller::CommonData)>> {
     let mut data = Vec::new();
 
-    for (k, v) in &state.map {
-        data.push((k.clone(), v.read().await.clone()));
+    for (k, v) in state.data.all_data() {
+        let v = v.read_state().await;
+        if let Some(v) = v.as_ref() {
+            data.push((k.clone(), v.common().clone()));
+        }
+    }
+
+    Json(data)
+}
+
+#[get("/interfaces/data/full")]
+async fn all_interfaces_full(
+    state: &State<ServerState>,
+) -> Json<Vec<(String, crate::controller::ControllerState)>> {
+    let mut data = Vec::new();
+
+    for (k, v) in state.data.all_data() {
+        let v = v.read_state().await;
+        if let Some(v) = v.as_ref() {
+            data.push((k.clone(), v.clone()));
+        }
+    }
+
+    Json(data)
+}
+
+#[get("/interfaces/settings")]
+async fn all_interfaces_settings(
+    state: &State<ServerState>,
+) -> Json<Vec<(String, crate::controller::ControllerSettings)>> {
+    let mut data = Vec::new();
+
+    for (k, v) in state.data.all_data() {
+        let v = v.read_settings().await;
+        if let Some(v) = v.as_ref() {
+            data.push((k.clone(), v.clone()));
+        }
     }
 
     Json(data)
@@ -48,13 +134,40 @@ async fn interface(
     state: &State<ServerState>,
 ) -> Result<Json<crate::controller::CommonData>, ServerError> {
     let data = state
-        .map
+        .data
         .get(name)
         .ok_or(ServerError::NotFound)?
-        .read()
-        .await
-        .clone();
-    Ok(Json(data))
+        .read_state()
+        .await;
+    Ok(Json(data.as_ref().ok_or(ServerError::NoData)?.common()))
+}
+
+#[get("/interface/<name>/full")]
+async fn interface_full(
+    name: &str,
+    state: &State<ServerState>,
+) -> Result<Json<crate::controller::ControllerState>, ServerError> {
+    let data = state
+        .data
+        .get(name)
+        .ok_or(ServerError::NotFound)?
+        .read_state()
+        .await;
+    Ok(Json(data.as_ref().ok_or(ServerError::NoData)?.clone()))
+}
+
+#[get("/interface/<name>/settings")]
+async fn interface_settings(
+    name: &str,
+    state: &State<ServerState>,
+) -> Result<Json<crate::controller::ControllerSettings>, ServerError> {
+    let data = state
+        .data
+        .get(name)
+        .ok_or(ServerError::NotFound)?
+        .read_settings()
+        .await;
+    Ok(Json(data.as_ref().ok_or(ServerError::NoData)?.clone()))
 }
 
 #[get("/metrics")]
@@ -65,9 +178,45 @@ fn metrics() -> Result<String, ServerError> {
     )
 }
 
+#[derive(serde::Serialize)]
+struct ControlState {
+    enabled: bool,
+}
+
+#[get("/control")]
+async fn get_control() -> Json<ControlState> {
+    let enabled = crate::config::access_config()
+        .await
+        .enable_secondary_control;
+    Json(ControlState { enabled })
+}
+
+#[post("/control/enable")]
+async fn enable_control() {
+    log::warn!("enabling control");
+    crate::config::write_to_config()
+        .await
+        .enable_secondary_control = true;
+}
+
+#[post("/control/disable")]
+async fn disable_control(state: &State<ServerState>) -> Result<(), ServerError> {
+    log::warn!("disabling control");
+    crate::config::write_to_config()
+        .await
+        .enable_secondary_control = false;
+    state
+        .tx_to_controllers
+        .send(crate::controller::VoltageCommand::None)?;
+    Ok(())
+}
+
 enum ServerError {
     Prometheus,
     NotFound,
+    InvalidPrimaryName,
+    NoData,
+    ControllerTx,
 }
 
 impl From<prometheus::Error> for ServerError {
@@ -76,11 +225,55 @@ impl From<prometheus::Error> for ServerError {
     }
 }
 
+impl<T> From<tokio::sync::watch::error::SendError<T>> for ServerError {
+    fn from(_: tokio::sync::watch::error::SendError<T>) -> Self {
+        Self::ControllerTx
+    }
+}
+
 impl<'a> rocket::response::Responder<'a, 'a> for ServerError {
     fn respond_to(self, _: &'a rocket::Request<'_>) -> rocket::response::Result<'a> {
         Err(match self {
             Self::NotFound => rocket::http::Status::NotFound,
-            ServerError::Prometheus => rocket::http::Status::InternalServerError,
+            Self::InvalidPrimaryName => rocket::http::Status::ServiceUnavailable,
+            Self::ControllerTx | Self::NoData | Self::Prometheus => {
+                rocket::http::Status::InternalServerError
+            }
         })
     }
 }
+
+pub struct Cors;
+
+#[rocket::async_trait]
+impl rocket::fairing::Fairing for Cors {
+    fn info(&self) -> rocket::fairing::Info {
+        rocket::fairing::Info {
+            name: "Add CORS headers to responses",
+            kind: rocket::fairing::Kind::Response,
+        }
+    }
+
+    async fn on_response<'r>(
+        &self,
+        _request: &'r rocket::Request<'_>,
+        response: &mut rocket::Response<'r>,
+    ) {
+        response.set_header(rocket::http::Header::new(
+            "Access-Control-Allow-Origin",
+            "*",
+        ));
+        response.set_header(rocket::http::Header::new(
+            "Access-Control-Allow-Methods",
+            "POST, GET, PATCH, OPTIONS",
+        ));
+        response.set_header(rocket::http::Header::new(
+            "Access-Control-Allow-Headers",
+            "*",
+        ));
+        response.set_header(rocket::http::Header::new(
+            "Access-Control-Allow-Credentials",
+            "true",
+        ));
+    }
+}

charge-controller-supervisor/src/web/static_handler.rs

@@ -0,0 +1,83 @@
+use include_dir::{include_dir, Dir};
+use rocket::{
+    http::{ContentType, Status},
+    outcome::IntoOutcome,
+    response::Responder,
+    route::{Handler, Outcome},
+    Data, Request,
+};
+use std::path::PathBuf;
+
+static UI_DIR_FILES: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/webapp");
+
+#[derive(Clone, Copy, Debug)]
+pub(super) struct UiStatic {}
+
+impl From<UiStatic> for Vec<rocket::Route> {
+    fn from(server: UiStatic) -> Self {
+        vec![rocket::Route::ranked(
+            None,
+            rocket::http::Method::Get,
+            "/<path..>",
+            server,
+        )]
+    }
+}
+
+#[rocket::async_trait]
+impl Handler for UiStatic {
+    async fn handle<'r>(&self, req: &'r Request<'_>, data: Data<'r>) -> Outcome<'r> {
+        use rocket::http::uri::fmt::Path;
+
+        let path = req
+            .segments::<rocket::http::uri::Segments<'_, Path>>(0..)
+            .ok()
+            .and_then(|segments| segments.to_path_buf(true).ok());
+
+        match path {
+            Some(p) => {
+                if p.as_os_str() == "" {
+                    let index = UI_DIR_FILES.get_file("index.html").map(|v| RawHtml {
+                        data: v.contents().to_vec(),
+                        name: PathBuf::from("index.html"),
+                    });
+
+                    index.respond_to(req).or_forward((data, Status::NotFound))
+                } else {
+                    let plus_index = p.join("index.html");
+                    let file = UI_DIR_FILES
+                        .get_file(&p)
+                        .map(|v| RawHtml {
+                            data: v.contents().to_vec(),
+                            name: p,
+                        })
+                        .or_else(|| {
+                            UI_DIR_FILES.get_file(&plus_index).map(|v| RawHtml {
+                                data: v.contents().to_vec(),
+                                name: plus_index,
+                            })
+                        });
+                    file.respond_to(req).or_forward((data, Status::NotFound))
+                }
+            }
+            None => Outcome::forward(data, Status::NotFound),
+        }
+    }
+}
+
+struct RawHtml {
+    data: Vec<u8>,
+    name: PathBuf,
+}
+
+impl<'r> Responder<'r, 'static> for RawHtml {
+    fn respond_to(self, request: &'r Request<'_>) -> rocket::response::Result<'static> {
+        let mut response = self.data.respond_to(request)?;
+        if let Some(ext) = self.name.extension()
+            && let Some(ct) = ContentType::from_extension(&ext.to_string_lossy())
+        {
+            response.set_header(ct);
+        }
+        Ok(response)
+    }
+}

charge-controller-supervisor/webapp/index.html

@@ -0,0 +1,26 @@
+<!doctype html>
+<html>
+
+<head>
+	<meta charset="utf-8" />
+	<meta name="viewport" content="width=device-width, initial-scale=1">
+	<title>Charge Control Control</title>
+	<link id="favicon" rel="icon"
+		href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🤯</text></svg>">
+	<link rel="stylesheet" href="style.css">
+	<script src="script.js"></script>
+</head>
+
+<body onload="init_main()">
+	<div class="container">
+		<h3>Follow primary controller:</h3>
+		<div class="selector" id="control-selector">
+			<input id="control-enabled" type="radio" name="control" onclick="enable_automatic_control()">
+			<label for="control-enabled">enabled</label>
+			<input id="control-disabled" type="radio" name="control" onclick="disable_automatic_control()">
+			<label for="control-disabled">disabled</label>
+		</div>
+	</div>
+</body>
+
+</html>

charge-controller-supervisor/webapp/script.js

@@ -0,0 +1,80 @@
+const api_url =
+  window.location.protocol +
+  "//" +
+  window.location.hostname +
+  ":" +
+  window.location.port;
+
+const delay = (time) => {
+  return new Promise((resolve) => setTimeout(resolve, time));
+};
+
+Object.prototype.disable = function () {
+  var that = this;
+  for (var i = 0, len = that.length; i < len; i++) {
+    that[i].disabled = true;
+  }
+  return that;
+};
+
+Object.prototype.enable = function () {
+  var that = this;
+  for (var i = 0, len = that.length; i < len; i++) {
+    that[i].disabled = false;
+  }
+  return that;
+};
+
+function init_main() {
+  refresh_buttons();
+}
+
+function disable_automatic_control() {
+  if (is_automatic_control) {
+    document.getElementById("control-disabled").checked = true;
+    document.body.classList.add("loading");
+
+    fetch(api_url + "/control/disable", { method: "POST" }).then(
+      async (response) => {
+        let delayres = await delay(100);
+        refresh_buttons();
+      }
+    );
+  }
+}
+
+function enable_automatic_control() {
+  if (!is_automatic_control) {
+    document.getElementById("control-enabled").checked = true;
+    document.body.classList.add("loading");
+    fetch(api_url + "/control/enable", { method: "POST" }).then(
+      async (response) => {
+        let delayres = await delay(100);
+        refresh_buttons();
+      }
+    );
+  }
+}
+
+function update_control_buttons(data) {
+  document.body.classList.remove("loading");
+  console.log("got data");
+  console.log(data);
+  is_automatic_control = data.enabled;
+  if (is_automatic_control) {
+    document.getElementById("control-enabled").checked = true;
+  } else {
+    document.getElementById("control-disabled").checked = true;
+  }
+}
+
+function refresh_buttons() {
+  console.log("get data");
+  console.log(api_url);
+  fetch(api_url + "/control").then(async (response) => {
+    console.log("got response");
+    json = await response.json();
+    console.log(json);
+    update_control_buttons(json);
+  });
+}

charge-controller-supervisor/webapp/style.css

@@ -0,0 +1,101 @@
+body {
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
+    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+  background-color: #333;
+  color: #333;
+}
+
+.container {
+  max-width: 40rem;
+  margin: auto;
+  padding: 0.5rem 2rem 2rem 2rem;
+  border-radius: 10px;
+  background-color: #faf9fd;
+}
+
+.outlink {
+  display: block;
+  font-weight: bold;
+  margin-top: 0.5rem;
+}
+
+a.outlink {
+  text-decoration: none;
+  color: rgb(52, 52, 246);
+}
+
+a.outlink:hover {
+  color: rgb(110, 100, 255);
+}
+
+.loading,
+.loading * {
+  cursor: progress;
+}
+
+.disabled,
+.disabled * {
+  cursor: not-allowed;
+}
+
+.selector {
+  padding: 1rem;
+  background-color: gray;
+  color: #333;
+  width: max-content;
+  border: 0.2rem;
+  border-radius: 6px;
+}
+
+label {
+  padding: 0.5rem 1rem;
+  margin: 0.5rem;
+  font-weight: bold;
+  transition: all 0.2s 0s ease;
+  border-radius: 4px;
+  text-align: center;
+}
+
+input[type="radio"] {
+  display: none;
+}
+
+input[type="radio"]:checked + label {
+  background-color: white;
+}
+
+input[type="radio"]:checked:disabled + label {
+  background-color: #ddd;
+}
+
+input[type="radio"]:disabled + label {
+  color: #666;
+}
+
+@media (width > 600px) {
+  .container {
+    margin-top: 2rem;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  body {
+    background-color: #191919;
+  }
+
+  .container {
+    background-color: #444;
+    color: #f0f0f0;
+  }
+
+  a.outlink {
+    text-decoration: none;
+    /* color: rgb(152, 152, 242); */
+    color: rgb(125, 125, 250);
+    /* color: rgb(94, 94, 252); */
+  }
+
+  a.outlink:hover {
+    color: rgb(130, 120, 255);
+  }
+}

control-loop.txt

@@ -1,2 +0,0 @@
-targeting pl's target voltage
-if load current > 0 or duty cycle < ~0.8 then there is power to spare

rust-toolchain.toml

@@ -0,0 +1,3 @@
+[toolchain]
+channel = "nightly-2025-01-16"
+targets = ["aarch64-unknown-linux-musl"]

string_fields.txt

@@ -1,12 +0,0 @@
-cabin_overheat_protection:
-	FanOnly
-	Off
-	On
-climate_keeper_mode:
-	off
-hvac_auto_request:
-	Override
-	On
-conn_charge_cable:
-	<invalid>
-	IEC

tesla-charge-controller/Cargo.toml

@@ -12,29 +12,30 @@ systemd-units = { enable = false }
 depends = "charge-controller-supervisor"
 
 [dependencies]
+chrono = "0.4.39"
 clap = { version = "4.5.23", features = ["derive"] }
+env_logger = "0.11.6"
+eyre = "0.6.12"
+if_chain = "1.0.2"
+include_dir = "0.7.4"
+lazy_static = "1.5.0"
+log = "0.4.22"
+notify-debouncer-mini = { version = "0.5.0", default-features = false }
+prometheus = "0.13.4"
+rand = "0.8.5"
+reqwest = { version = "0.12.9", default-features = false, features = [
+	"json",
+	"rustls-tls",
+] }
+rocket = { version = "0.5.1", features = ["json"] }
 ron = "0.8.1"
 serde = { version = "1.0.216", features = ["derive"] }
 serde_json = "1.0.134"
-tokio = { version = "1.42.0", features = ["full"] }
-thiserror = "2.0.9"
-rocket = { version = "0.5.1", features = ["json"] }
-include_dir = "0.7.4"
-chrono = "0.4.39"
-prometheus = "0.13.4"
-env_logger = "0.11.6"
-log = "0.4.22"
 serialport = "4.6.1"
+thiserror = "2.0.9"
+tokio = { version = "1.42.0", features = ["full"] }
 tokio-modbus = "0.16.1"
 tokio-serial = "5.4.4"
-if_chain = "1.0.2"
-notify-debouncer-mini = { version = "0.5.0", default-features = false }
-lazy_static = "1.5.0"
-rand = "0.8.5"
-reqwest = { version = "0.12.9", default-features = false, features = [
-	"rustls-tls",
-] }
-eyre = "0.6.12"
 
 [lints]
 workspace = true

tesla-charge-controller/src/api/http.rs

@@ -83,6 +83,7 @@ impl Vehicle {
             .timeout(std::time::Duration::from_secs(5))
             .send()
             .await?;
+
         let response: ApiResponseOuter = data.json().await?;
         let response = response.response;
 
@@ -94,6 +95,7 @@ impl Vehicle {
         Ok(state.charge_state)
     }
 
+    #[expect(dead_code, reason = "active charge control not yet implemented")]
     pub async fn set_charging_amps(&self, charging_amps: i64) -> eyre::Result<()> {
         self.client
             .post(format!(

tesla-charge-controller/src/api/mod.rs

@@ -42,34 +42,36 @@ impl Car {
         }
     }
 
-    pub fn vehicle(&self) -> &http::Vehicle {
+    pub const fn vehicle(&self) -> &http::Vehicle {
         &self.vehicle
     }
 
-    pub fn state(&self) -> &tokio::sync::RwLock<CarState> {
+    pub const fn state(&self) -> &tokio::sync::RwLock<CarState> {
         &self.state
     }
 }
 
 impl CarState {
-    pub fn charge_state(&self) -> Option<&ChargeState> {
-        if self.is_outdated() {
+    pub async fn charge_state(&self) -> Option<&ChargeState> {
+        if self.is_outdated().await {
             None
         } else {
             self.charge_state.as_ref()
         }
     }
 
-    pub fn is_charging(&self) -> bool {
-        self.charge_state().is_some_and(ChargeState::is_charging)
+    pub async fn is_charging(&self) -> bool {
+        self.charge_state()
+            .await
+            .is_some_and(ChargeState::is_charging)
     }
 
     pub fn data_age(&self) -> std::time::Duration {
         std::time::Instant::now().duration_since(self.data_received)
     }
 
-    fn is_outdated(&self) -> bool {
-        self.data_age() > crate::CONFIG.read().car_state_interval
+    async fn is_outdated(&self) -> bool {
+        self.data_age() > crate::config::access_config().await.car_state_interval
     }
 }
 
@@ -151,7 +153,7 @@ impl ChargeState {
     }
 }
 
-#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
 pub enum ChargingState {
     Charging,
     Stopped,

tesla-charge-controller/src/config.rs

@@ -1,5 +1,114 @@
 use serde::{Deserialize, Serialize};
 
+static CONFIG_PATH: std::sync::OnceLock<std::path::PathBuf> = std::sync::OnceLock::new();
+pub(super) static CONFIG: std::sync::OnceLock<tokio::sync::RwLock<Config>> =
+    std::sync::OnceLock::new();
+
+pub async fn access_config<'a>() -> tokio::sync::RwLockReadGuard<'a, Config> {
+    CONFIG.get().unwrap().read().await
+}
+
+pub(super) struct ConfigWatcher {
+    _debouncer: notify_debouncer_mini::Debouncer<notify_debouncer_mini::notify::RecommendedWatcher>,
+    _handle: tokio::task::JoinHandle<()>,
+}
+
+impl ConfigWatcher {
+    pub fn new(path: impl AsRef<std::path::Path>) -> Option<Self> {
+        let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel();
+
+        let mut debouncer =
+            notify_debouncer_mini::new_debouncer(std::time::Duration::from_secs(1), move |v| {
+                tx.send(v).unwrap();
+            })
+            .ok()?;
+
+        debouncer
+            .watcher()
+            .watch(
+                path.as_ref(),
+                notify_debouncer_mini::notify::RecursiveMode::NonRecursive,
+            )
+            .ok()?;
+
+        let config_path = std::path::PathBuf::from(path.as_ref());
+
+        let handle = tokio::task::spawn(async move {
+            loop {
+                match rx.recv().await {
+                    Some(Ok(_event)) => {
+                        let mut config = Config::load(&config_path);
+                        config.validate();
+
+                        if let Err(e) = overwrite_config(config).await {
+                            log::error!("{e:?}");
+                        }
+                    }
+                    Some(Err(e)) => log::error!("Error {e:?} from watcher"),
+                    None => {}
+                }
+            }
+        });
+
+        Some(Self {
+            _debouncer: debouncer,
+            _handle: handle,
+        })
+    }
+}
+
+async fn overwrite_config(config: Config) -> eyre::Result<()> {
+    *CONFIG
+        .get()
+        .ok_or_else(|| eyre::eyre!("could not get config"))?
+        .write()
+        .await = config;
+    Ok(())
+}
+
+pub fn init_config(path: impl AsRef<std::path::Path>) -> Option<ConfigWatcher> {
+    log::trace!("loading config...");
+    let config = Config::load_and_save_defaults(&path);
+    log::trace!("watching config for changes...");
+    let config_watcher = ConfigWatcher::new(&path);
+    let _ = CONFIG_PATH.get_or_init(|| path.as_ref().to_path_buf());
+    CONFIG.set(tokio::sync::RwLock::new(config)).unwrap();
+
+    config_watcher
+}
+
+pub struct ConfigHandle<'a> {
+    handle: tokio::sync::RwLockWriteGuard<'a, Config>,
+}
+
+impl<'a> core::ops::Deref for ConfigHandle<'a> {
+    type Target = tokio::sync::RwLockWriteGuard<'a, Config>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.handle
+    }
+}
+
+impl std::ops::DerefMut for ConfigHandle<'_> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.handle
+    }
+}
+
+impl Drop for ConfigHandle<'_> {
+    fn drop(&mut self) {
+        if let Err(e) = self.save() {
+            log::error!("error saving config on drop of handle: {e:?}");
+        }
+    }
+}
+
+pub async fn write_to_config<'a>() -> ConfigHandle<'a> {
+    ConfigHandle {
+        handle: CONFIG.get().unwrap().write().await,
+    }
+}
+
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
 #[serde(default)]
 pub struct Config {
@@ -34,20 +143,6 @@ impl Default for Config {
     }
 }
 
-impl common::config::ConfigTrait for Config {
-    fn load_and_save_defaults(path: impl AsRef<std::path::Path>) -> Self {
-        todo!()
-    }
-
-    fn save(&self) -> eyre::Result<()> {
-        todo!()
-    }
-
-    fn is_valid(&self) -> bool {
-        todo!()
-    }
-}
-
 #[derive(Serialize, Deserialize, Copy, Clone, Debug, PartialEq)]
 #[serde(default)]
 pub struct PidControls {
@@ -67,3 +162,41 @@ impl Default for PidControls {
         }
     }
 }
+
+impl Config {
+    fn load(path: impl AsRef<std::path::Path>) -> Self {
+        serde_json::from_str(&std::fs::read_to_string(path).unwrap()).unwrap()
+    }
+
+    fn save_to(&self, path: impl AsRef<std::path::Path>) -> eyre::Result<()> {
+        Ok(serde_json::ser::to_writer_pretty(
+            std::io::BufWriter::new(std::fs::File::create(path)?),
+            self,
+        )?)
+    }
+
+    fn save(&self) -> eyre::Result<()> {
+        self.save_to(CONFIG_PATH.get().unwrap())
+    }
+
+    fn load_and_save_defaults(path: impl AsRef<std::path::Path>) -> Self {
+        let mut config = Self::load(&path);
+        config.validate();
+        let result = config.save_to(path);
+        if let Err(e) = result {
+            log::error!("Failed to save config: {e:#?}",);
+        }
+        config
+    }
+
+    fn validate(&mut self) {
+        self.shutoff_voltage = self.shutoff_voltage.clamp(40.0, 60.0);
+        self.max_rate = self.max_rate.clamp(0, 30);
+        self.min_rate = self.min_rate.clamp(0, self.max_rate);
+        // self.duty_cycle_too_high = self.duty_cycle_too_high.clamp(0.0, 1.0);
+        // self.duty_cycle_too_low = self.duty_cycle_too_low.clamp(0.0, 1.0);
+        self.pid_controls.proportional_gain = self.pid_controls.proportional_gain.clamp(0.0, 50.0);
+        self.pid_controls.derivative_gain = self.pid_controls.derivative_gain.clamp(0.0, 50.0);
+        self.pid_controls.load_divisor = self.pid_controls.load_divisor.clamp(1.0, 50.0);
+    }
+}

tesla-charge-controller/src/control.rs

@@ -4,6 +4,7 @@ pub struct VehicleController {
     control_state: ChargeRateControllerState,
 }
 
+#[expect(dead_code, reason = "not all states are currently in use")]
 pub enum ChargeRateControllerState {
     Inactive,
     Charging { rate_amps: i64 },
@@ -14,7 +15,7 @@ pub enum InterfaceRequest {
 }
 
 impl VehicleController {
-    pub fn new(
+    pub const fn new(
         car: std::sync::Arc<crate::api::Car>,
         requests: tokio::sync::mpsc::UnboundedReceiver<InterfaceRequest>,
     ) -> Self {
@@ -25,14 +26,35 @@ impl VehicleController {
         }
     }
 
+    pub async fn run(&mut self) -> ! {
+        let (mut car_state_tick, mut pid_loop_tick) = {
+            let config = crate::config::access_config().await;
+            let car_state_tick = tokio::time::interval(config.car_state_interval);
+            let pid_loop_tick = tokio::time::interval(std::time::Duration::from_secs(
+                config.pid_controls.loop_time_seconds,
+            ));
+            (car_state_tick, pid_loop_tick)
+        };
+        loop {
+            tokio::select! {
+                _ = car_state_tick.tick() => { self.car.update().await; },
+                _ = pid_loop_tick.tick() => { self.run_cycle().await; }
+                Some(req) = self.requests.recv() => { self.process_requests(req).await; }
+            }
+        }
+    }
+
     pub async fn run_cycle(&mut self) {
         let age = self.car.state().read().await.data_age();
-        if age >= crate::CONFIG.read().car_state_interval {
+        if age >= crate::config::access_config().await.car_state_interval {
             self.car.update().await;
         }
         match self.control_state {
             ChargeRateControllerState::Inactive => {
-                if let Some(state) = self.car.state().read().await.charge_state() {
+                let car_state = self.car.state().read().await;
+                let state = car_state.charge_state().await;
+
+                if let Some(state) = state {
                     if state.is_charging() {
                         self.control_state = ChargeRateControllerState::Charging {
                             rate_amps: state.charge_amps,
@@ -40,19 +62,19 @@ impl VehicleController {
                     }
                 }
             }
-            ChargeRateControllerState::Charging { rate_amps } => todo!(),
+            ChargeRateControllerState::Charging { rate_amps: _ } => todo!(),
         }
     }
 
-    pub async fn process_requests(&mut self) -> eyre::Result<()> {
-        while let Some(req) = self.requests.recv().await {
-            match req {
-                InterfaceRequest::FlashLights => {
-                    self.car.vehicle().flash_lights().await?;
+    #[expect(
+        clippy::needless_pass_by_ref_mut,
+        reason = "this will eventually need to mutate self"
+    )]
+    pub async fn process_requests(&mut self, req: InterfaceRequest) {
+        if let Err(e) = match req {
+            InterfaceRequest::FlashLights => self.car.vehicle().flash_lights().await,
+        } {
+            log::error!("failed to execute request: {e:?}");
         }
     }
 }
-
-        Ok(())
-    }
-}

tesla-charge-controller/src/main.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::significant_drop_tightening)]
+
 use std::path::PathBuf;
 
 use clap::Parser;
@@ -7,16 +9,13 @@ mod config;
 mod control;
 mod server;
 
-static CONFIG: common::config::ConfigSingleton<config::Config> =
-    common::config::ConfigSingleton::new();
-
 #[derive(clap::Parser, Debug, Clone)]
 #[clap(author, version, about, long_about = None)]
 struct Args {
     #[command(subcommand)]
     command: Commands,
-    #[clap(long, default_value = "/etc/tesla-charge-controller")]
-    config_dir: PathBuf,
+    #[clap(long, default_value = "/etc/tesla-charge-controller/config.json")]
+    config: PathBuf,
 }
 
 #[derive(clap::Subcommand, Debug, Clone)]
@@ -29,26 +28,55 @@ enum Commands {
 
 #[tokio::main]
 async fn main() {
-    common::init_log();
+    env_logger::builder()
+        .format_module_path(false)
+        .format_timestamp(
+            if std::env::var("LOG_TIMESTAMP").is_ok_and(|v| v == "false") {
+                None
+            } else {
+                Some(env_logger::TimestampPrecision::Seconds)
+            },
+        )
+        .init();
 
-    if let Err(e) = run().await {
+    let args = Args::parse();
+    match args.command {
+        Commands::Watch => {
+            if let Err(e) = run(args).await {
                 log::error!("{e:?}");
                 std::process::exit(1);
             }
         }
+        Commands::GenerateConfig => {
+            let config = config::Config::default();
+            match serde_json::to_string_pretty(&config) {
+                Ok(config_json) => {
+                    println!("{config_json}");
+                }
+                Err(e) => {
+                    eprintln!("error serializing config: {e:?}");
+                }
+            }
+        }
+    }
+}
 
-async fn run() -> eyre::Result<()> {
-    let args = Args::parse();
-    CONFIG.load(args.config_dir.join("tesla.json"))?;
+async fn run(args: Args) -> eyre::Result<()> {
+    let _config_watcher = config::init_config(args.config);
 
-    let car = api::Car::new(&CONFIG.read().car_vin);
+    let car = {
+        let config = config::access_config().await;
+        api::Car::new(&config.car_vin)
+    };
     let car = std::sync::Arc::new(car);
     let (tx, rx) = tokio::sync::mpsc::unbounded_channel();
     let mut vehicle_controller = control::VehicleController::new(car.clone(), rx);
     let server = server::launch_server(server::ServerState::new(car, tx));
-    server.await;
 
-    vehicle_controller.run_cycle().await;
+    tokio::select! {
+        () = server => {}
+        () = vehicle_controller.run() => {}
+    }
 
     Ok(())
 }

tesla-charge-controller/src/server/mod.rs

@@ -11,7 +11,11 @@ use rocket::{
 use serde::{Deserialize, Serialize};
 use tokio::sync::mpsc::UnboundedSender;
 
-use crate::{api::Car, control::InterfaceRequest};
+use crate::{
+    api::Car,
+    config::{access_config, write_to_config},
+    control::InterfaceRequest,
+};
 
 use self::static_handler::UiStatic;
 
@@ -23,7 +27,7 @@ pub struct ServerState {
 }
 
 impl ServerState {
-    pub fn new(car: Arc<Car>, api_requests: UnboundedSender<InterfaceRequest>) -> Self {
+    pub const fn new(car: Arc<Car>, api_requests: UnboundedSender<InterfaceRequest>) -> Self {
         Self { car, api_requests }
     }
 }
@@ -83,6 +87,7 @@ async fn car_state(
             .read()
             .await
             .charge_state()
+            .await
             .ok_or(ServerError::NoData)?
             .clone(),
     ))
@@ -98,8 +103,8 @@ struct ControlState {
 
 #[get("/control-state")]
 async fn control_state(state: &State<ServerState>) -> Result<Json<ControlState>, ServerError> {
-    let is_charging = state.car.state().read().await.is_charging();
-    let config = crate::CONFIG.read();
+    let is_charging = state.car.state().read().await.is_charging().await;
+    let config = access_config().await;
     let control_enable = config.control_enable;
     let max_rate = config.max_rate;
     let min_rate = config.min_rate;
@@ -119,29 +124,29 @@ fn flash(state: &State<ServerState>, remote_addr: std::net::IpAddr) {
 }
 
 #[post("/disable-control")]
-fn disable_control(remote_addr: std::net::IpAddr) {
+async fn disable_control(remote_addr: std::net::IpAddr) {
     log::warn!("disabling control: {remote_addr:?}");
-    crate::CONFIG.write().control_enable = false;
+    write_to_config().await.control_enable = false;
 }
 
 #[post("/enable-control")]
-fn enable_control(remote_addr: std::net::IpAddr) {
+async fn enable_control(remote_addr: std::net::IpAddr) {
     log::warn!("enabling control: {remote_addr:?}");
-    crate::CONFIG.write().control_enable = true;
+    write_to_config().await.control_enable = true;
 }
 
 #[post("/shutoff/voltage/<voltage>")]
-fn set_shutoff(voltage: f64, remote_addr: std::net::IpAddr) {
+async fn set_shutoff(voltage: f64, remote_addr: std::net::IpAddr) {
     log::warn!("setting shutoff voltage: {remote_addr:?}");
     let voltage = voltage.clamp(40., 60.);
-    crate::CONFIG.write().shutoff_voltage = voltage;
+    write_to_config().await.shutoff_voltage = voltage;
 }
 
 #[post("/shutoff/time/<time>")]
-fn set_shutoff_time(time: u64, remote_addr: std::net::IpAddr) {
+async fn set_shutoff_time(time: u64, remote_addr: std::net::IpAddr) {
     log::warn!("setting shutoff time: {remote_addr:?}");
     let time = time.clamp(5, 120);
-    crate::CONFIG.write().shutoff_voltage_time_seconds = time;
+    write_to_config().await.shutoff_voltage_time_seconds = time;
 }
 
 #[derive(Clone, Copy, Serialize, Deserialize, Debug)]
@@ -151,8 +156,8 @@ struct ShutoffStatus {
 }
 
 #[get("/shutoff/status")]
-fn shutoff_status() -> Json<ShutoffStatus> {
-    let config = crate::CONFIG.read();
+async fn shutoff_status() -> Json<ShutoffStatus> {
+    let config = access_config().await;
     Json(ShutoffStatus {
         voltage: config.shutoff_voltage,
         time: config.shutoff_voltage_time_seconds,
@@ -160,46 +165,48 @@ fn shutoff_status() -> Json<ShutoffStatus> {
 }
 
 #[post("/set-max/<limit>")]
-fn set_max(limit: i64, remote_addr: std::net::IpAddr) {
+async fn set_max(limit: i64, remote_addr: std::net::IpAddr) {
     log::warn!("setting max: {remote_addr:?}");
-    let limit = limit.clamp(crate::CONFIG.read().min_rate, 32);
-    crate::CONFIG.write().max_rate = limit;
+    let mut config = write_to_config().await;
+    let limit = limit.clamp(config.min_rate, 32);
+    config.max_rate = limit;
 }
 
 #[post("/set-min/<limit>")]
-fn set_min(limit: i64, remote_addr: std::net::IpAddr) {
+async fn set_min(limit: i64, remote_addr: std::net::IpAddr) {
     log::warn!("setting min: {remote_addr:?}");
-    let limit = limit.clamp(0, crate::CONFIG.read().max_rate);
-    crate::CONFIG.write().min_rate = limit;
+    let mut config = write_to_config().await;
+    let limit = limit.clamp(0, config.max_rate);
+    config.min_rate = limit;
 }
 
 #[post("/pid-settings/proportional/<gain>")]
-fn set_proportional_gain(gain: f64, remote_addr: std::net::IpAddr) {
+async fn set_proportional_gain(gain: f64, remote_addr: std::net::IpAddr) {
     log::warn!("setting proportional gain: {remote_addr:?}");
-    crate::CONFIG.write().pid_controls.proportional_gain = gain;
+    write_to_config().await.pid_controls.proportional_gain = gain;
 }
 
 #[post("/pid-settings/derivative/<gain>")]
-fn set_derivative_gain(gain: f64, remote_addr: std::net::IpAddr) {
+async fn set_derivative_gain(gain: f64, remote_addr: std::net::IpAddr) {
     log::warn!("setting derivative gain: {remote_addr:?}");
-    crate::CONFIG.write().pid_controls.derivative_gain = gain;
+    write_to_config().await.pid_controls.derivative_gain = gain;
 }
 
 #[post("/pid-settings/loop_time_seconds/<time>")]
-fn set_pid_loop_length(time: u64, remote_addr: std::net::IpAddr) {
+async fn set_pid_loop_length(time: u64, remote_addr: std::net::IpAddr) {
     log::warn!("setting pid loop interval: {remote_addr:?}");
-    crate::CONFIG.write().pid_controls.loop_time_seconds = time;
+    write_to_config().await.pid_controls.loop_time_seconds = time;
 }
 
 #[post("/pid-settings/load_divisor/<divisor>")]
-fn set_load_divisor(divisor: f64, remote_addr: std::net::IpAddr) {
+async fn set_load_divisor(divisor: f64, remote_addr: std::net::IpAddr) {
     log::warn!("setting load divisor interval: {remote_addr:?}");
-    crate::CONFIG.write().pid_controls.load_divisor = divisor;
+    write_to_config().await.pid_controls.load_divisor = divisor;
 }
 
 #[get("/pid-settings/status")]
-fn pid_settings() -> Json<crate::config::PidControls> {
-    Json(crate::CONFIG.read().pid_controls)
+async fn pid_settings() -> Json<crate::config::PidControls> {
+    Json(access_config().await.pid_controls)
 }
 
 #[get("/metrics")]

tesla-charge-controller/src/server/static_handler.rs

@@ -52,10 +52,12 @@ impl Handler for UiStatic {
                             data: v.contents().to_vec(),
                             name: p,
                         })
-                        .or(UI_DIR_FILES.get_file(&plus_index).map(|v| RawHtml {
+                        .or_else(|| {
+                            UI_DIR_FILES.get_file(&plus_index).map(|v| RawHtml {
                                 data: v.contents().to_vec(),
                                 name: plus_index,
-                        }));
+                            })
+                        });
                     file.respond_to(req).or_forward((data, Status::NotFound))
                 }
             }

watch.sh

@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-(
-	trap 'kill 0' SIGINT
-	cargo watch -w "src" -x check -s 'touch .trigger' &
-	RUST_LOG=error,warn,info cargo watch --no-vcs-ignores -w .trigger -x "run -- --config-dir test-config watch"
-)