diff --git a/homekit-controller/src/tlv8/data_types.rs b/homekit-controller/src/tlv8/data_types.rs
new file mode 100644
index 0000000..d680087
--- /dev/null
+++ b/homekit-controller/src/tlv8/data_types.rs
@@ -0,0 +1,151 @@
+use super::Tlv;
+
+pub enum TlvType {
+    Method,
+    Identifier,
+    Salt,
+    PublicKey,
+    Proof,
+    EncryptedData,
+    State,
+    Error,
+    RetryDelay,
+    Certificate,
+    Signature,
+    Permissions,
+    PermissionRegularUser,
+    PermissionAdminUser,
+    FragmentData,
+    FragmentLast,
+    SessionID,
+}
+
+impl From<TlvType> for u8 {
+    fn from(value: TlvType) -> Self {
+        match value {
+            TlvType::Method => 0,
+            TlvType::Identifier => 1,
+            TlvType::Salt => 2,
+            TlvType::PublicKey => 3,
+            TlvType::Proof => 4,
+            TlvType::EncryptedData => 5,
+            TlvType::State => 6,
+            TlvType::Error => 7,
+            TlvType::RetryDelay => 8,
+            TlvType::Certificate => 9,
+            TlvType::Signature => 10,
+            TlvType::Permissions => 11,
+            TlvType::PermissionRegularUser => 0,
+            TlvType::PermissionAdminUser => 1,
+            TlvType::FragmentData => 12,
+            TlvType::FragmentLast => 13,
+            TlvType::SessionID => 14,
+        }
+    }
+}
+
+#[allow(unused)]
+#[derive(Debug, Clone)]
+pub enum TlvData {
+    Bytes(Vec<u8>),
+    Tlv8(Vec<Tlv>),
+    Integer(TlvInteger),
+    Float(f64),
+    String(String),
+    Uint(TlvUnsignedInteger),
+}
+
+#[derive(Debug, Clone)]
+pub enum TlvInteger {
+    OneByte(i8),
+    TwoBytes(i16),
+    FourBytes(i32),
+    EightBytes(i64),
+}
+
+impl TlvInteger {
+    pub fn to_le_bytes(&self) -> Vec<u8> {
+        match self {
+            TlvInteger::OneByte(v) => v.to_le_bytes().to_vec(),
+            TlvInteger::TwoBytes(v) => v.to_le_bytes().to_vec(),
+            TlvInteger::FourBytes(v) => v.to_le_bytes().to_vec(),
+            TlvInteger::EightBytes(v) => v.to_le_bytes().to_vec(),
+        }
+    }
+}
+
+impl<T> From<T> for TlvData
+where
+    T: Into<TlvInteger>,
+{
+    fn from(value: T) -> Self {
+        Self::Integer(value.into())
+    }
+}
+
+impl From<i8> for TlvInteger {
+    fn from(value: i8) -> Self {
+        Self::OneByte(value)
+    }
+}
+
+impl From<i16> for TlvInteger {
+    fn from(value: i16) -> Self {
+        Self::TwoBytes(value)
+    }
+}
+
+impl From<i32> for TlvInteger {
+    fn from(value: i32) -> Self {
+        Self::FourBytes(value)
+    }
+}
+
+impl From<i64> for TlvInteger {
+    fn from(value: i64) -> Self {
+        Self::EightBytes(value)
+    }
+}
+
+#[derive(Debug, Clone)]
+pub enum TlvUnsignedInteger {
+    OneByte(u8),
+    TwoBytes(u16),
+    FourBytes(u32),
+    EightBytes(u64),
+}
+
+impl TlvUnsignedInteger {
+    pub fn to_le_bytes(&self) -> Vec<u8> {
+        match self {
+            TlvUnsignedInteger::OneByte(v) => v.to_le_bytes().to_vec(),
+            TlvUnsignedInteger::TwoBytes(v) => v.to_le_bytes().to_vec(),
+            TlvUnsignedInteger::FourBytes(v) => v.to_le_bytes().to_vec(),
+            TlvUnsignedInteger::EightBytes(v) => v.to_le_bytes().to_vec(),
+        }
+    }
+}
+
+impl From<u8> for TlvUnsignedInteger {
+    fn from(value: u8) -> Self {
+        Self::OneByte(value)
+    }
+}
+
+impl From<u16> for TlvUnsignedInteger {
+    fn from(value: u16) -> Self {
+        Self::TwoBytes(value)
+    }
+}
+
+impl From<u32> for TlvUnsignedInteger {
+    fn from(value: u32) -> Self {
+        Self::FourBytes(value)
+    }
+}
+
+impl From<u64> for TlvUnsignedInteger {
+    fn from(value: u64) -> Self {
+        Self::EightBytes(value)
+    }
+}
diff --git a/homekit-controller/src/tlv8/mod.rs b/homekit-controller/src/tlv8/mod.rs
new file mode 100644
index 0000000..ac6f6a5
--- /dev/null
+++ b/homekit-controller/src/tlv8/mod.rs
@@ -0,0 +1,258 @@
+mod data_types;
+
+use std::collections::HashMap;
+
+#[allow(unused)]
+pub use data_types::{TlvData, TlvInteger, TlvType, TlvUnsignedInteger};
+
+use thiserror::Error;
+
+pub fn decode(data: &[u8]) -> Result<HashMap<u8, Vec<u8>>, TlvError> {
+    let mut tlvs = HashMap::new();
+    let mut data = data;
+
+    while data.len() > 0 {
+        let tlv_len = (data[1] as usize) + 2;
+        let current;
+        (current, data) = data.split_at(tlv_len);
+
+        if data.len() < 3 {
+            return Err(TlvError::TooShort);
+        }
+
+        if data.len() < tlv_len {
+            return Err(TlvError::WrongLength);
+        }
+
+        let tlv_type = current[0];
+        let tlv_data = current[2..].to_vec();
+        tlvs.insert(tlv_type, tlv_data);
+    }
+    Ok(tlvs)
+}
+
+fn decode_single(data: &[u8]) -> Result<(u8, Vec<u8>), TlvError> {
+    let tlv_type = data[0];
+    let tlv_len = data[1];
+    let data = &data[2..];
+    Ok((tlv_type, if tlv_len == 0 { vec![] } else { data.to_vec() }))
+}
+
+#[derive(Debug, Error)]
+pub enum TlvError {
+    #[error("too short")]
+    TooShort,
+    #[error("wrong length")]
+    WrongLength,
+}
+
+pub trait TlvEncode {
+    fn encode(&self) -> Vec<u8>;
+}
+
+// impl<const N: usize> TlvEncode for &[(u8, Vec<u8>); N] {
+//     fn encode(&self) -> Vec<u8> {
+//         (*self as &[(u8, Vec<u8>)]).encode()
+//     }
+// }
+
+impl<T> TlvEncode for T
+where
+    T: AsRef<[(u8, Vec<u8>)]>,
+{
+    fn encode(&self) -> Vec<u8> {
+        self.as_ref()
+            .iter()
+            .flat_map(|(tlv_type, tlv_data)| {
+                let length = tlv_data.len() as u32;
+                let packets = tlv_data
+                    .chunks(255)
+                    .enumerate()
+                    .flat_map(|(packet_num, data)| {
+                        let mut packet = vec![*tlv_type];
+                        packet.push((length - 255 * (packet_num as u32)) as u8);
+                        packet.extend_from_slice(data);
+                        packet
+                    })
+                    .collect::<Vec<_>>();
+                if packets.is_empty() {
+                    let mut first_packet = vec![*tlv_type];
+                    first_packet.extend_from_slice(&length.to_le_bytes());
+                    first_packet.push(0);
+                    first_packet
+                } else {
+                    packets
+                }
+            })
+            .collect()
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct Tlv(u8, TlvData);
+
+impl Tlv {
+    pub fn new<A: Into<u8>>(tlv_type: A, tlv_data: TlvData) -> Self {
+        Self(tlv_type.into(), tlv_data)
+    }
+
+    pub fn encode(&self) -> Vec<u8> {
+        let Tlv(tlv_type, data) = self;
+        let bytes = match data {
+            TlvData::Bytes(v) => v.clone(),
+            TlvData::Tlv8(v) => todo!(),
+            TlvData::Integer(v) => v.to_le_bytes(),
+            TlvData::Float(v) => v.to_le_bytes().to_vec(),
+            TlvData::String(v) => v.as_bytes().to_vec(),
+            TlvData::Uint(v) => v.to_le_bytes(),
+        };
+        let length = bytes.len() as u32;
+        let packets = bytes
+            .chunks(255)
+            .enumerate()
+            .flat_map(|(packet_num, data)| {
+                let mut packet = vec![*tlv_type];
+                packet.push((length - 255 * (packet_num as u32)) as u8);
+                packet.extend_from_slice(data);
+                packet
+            })
+            .collect::<Vec<_>>();
+        if packets.is_empty() {
+            let mut first_packet = vec![*tlv_type];
+            first_packet.extend_from_slice(&length.to_le_bytes());
+            first_packet.push(0);
+            first_packet
+        } else {
+            packets
+        }
+    }
+
+    pub fn decode_single(data: &[u8]) -> Result<Self, TlvError> {
+        let tlv_type = data[0];
+        let tlv_len = data[1];
+        let data = &data[2..];
+        Ok(Self(
+            tlv_type,
+            TlvData::Bytes(if tlv_len == 0 { vec![] } else { data.to_vec() }),
+        ))
+    }
+
+    pub fn tlv_type(&self) -> u8 {
+        self.0
+    }
+
+    pub fn tlv_data(&self) -> &TlvData {
+        &self.1
+    }
+
+    pub fn is_type<T: Into<u8>>(&self, value: T) -> bool {
+        self.0 == value.into()
+    }
+}
+
+impl TlvData {
+    pub fn as_bytes(&self) -> Vec<u8> {
+        match self {
+            TlvData::Bytes(val) => val.clone(),
+            TlvData::Tlv8(_val) => todo!(),
+            TlvData::Integer(val) => val.to_le_bytes(),
+            TlvData::Float(_val) => todo!(),
+            TlvData::String(val) => val.as_bytes().to_vec(),
+            TlvData::Uint(val) => val.to_le_bytes(),
+        }
+    }
+}
+
+pub trait TlvEncodableData {
+    fn encode_value(&self) -> Vec<u8>;
+}
+
+impl<const N: usize> TlvEncodableData for &[u8; N] {
+    fn encode_value(&self) -> Vec<u8> {
+        (*self as &[u8]).encode_value()
+    }
+}
+
+impl TlvEncodableData for &[u8] {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_vec()
+    }
+}
+
+impl TlvEncodableData for i8 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for i16 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for i32 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for i64 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for isize {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for u8 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for u16 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for u32 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for u64 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for usize {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for f32 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for f64 {
+    fn encode_value(&self) -> Vec<u8> {
+        self.to_le_bytes().to_vec()
+    }
+}
+
+impl TlvEncodableData for String {
+    fn encode_value(&self) -> Vec<u8> {
+        self.as_bytes().to_vec()
+    }
+}