Initial commit: Lippert OneControl protocol reverse engineering
✅ Protocol fully reversed from decompiled Xamarin app ✅ All 431 .NET assemblies extracted and decompiled ✅ COBS encoder/decoder implemented in Python ✅ CRC8 checksum implementation ✅ Complete BLE client for OneControl devices ✅ Comprehensive documentation Files included: - cobs_protocol.py: COBS encoding/decoding + CRC8 - onecontrol_client.py: Full BLE client implementation - Complete protocol documentation - Home Assistant integration guide - ESPHome Bluetooth Proxy setup - Extraction scripts for reference Ready for testing with RV hardware (April 2025)
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# Lippert OneControl - Complete Implementation Guide
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## 🎉 Protocol FULLY REVERSED
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All protocol details have been extracted from the decompiled source code. You can now build the Home Assistant integration **immediately** without waiting for April!
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## Protocol Specification
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### BLE UUIDs (CONFIRMED from DirectConnectionMyRvLinkBle.cs:28-34)
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```
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Service: 00000030-0200-A58E-E411-AFE28044E62C
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Write Char: 00000033-0200-A58E-E411-AFE28044E62C
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Read Char: 00000034-0200-A58E-E411-AFE28044E62C
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Version: 00000031-0200-A58E-E411-AFE28044E62C
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```
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### Encoding (from DirectConnectionMyRvLinkBle.cs:44)
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```csharp
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CobsEncoder(prependStartFrame: true, useCrc: true, frameByte: 0, numDataBits: 6)
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```
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### Packet Structure (Unencoded)
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**Before COBS encoding:**
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```
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[Seq (2 bytes, LE)] [CmdType (1)] [TableID (1)] [Payload...] [CRC8 (1)]
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```
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**Indexes (from MyRvLinkCommandActionSwitch.cs):**
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- Bytes 0-1: Client Command ID (sequence)
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- Byte 2: Command Type
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- Byte 3: Device Table ID
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- Byte 4: Device State (for ActionSwitch)
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- Byte 5+: Device IDs
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### Command Types (from MyRvLinkCommandType.cs)
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```
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GetDevices = 1
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ActionSwitch = 64 (0x40) - Lights, Pumps, Fans
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ActionMovement = 65 (0x41) - Awnings, Slides
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ActionDimmable = 67 (0x43) - Dimmable Lights
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ActionRgb = 68 (0x44) - RGB Lights
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ActionHvac = 69 (0x45) - HVAC/Climate
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```
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## Python Implementation
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### 1. COBS + CRC8 Implementation
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Based on `IDS.Portable.Common.COBS/CobsEncoder.cs` and `Crc8.cs`:
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```python
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# cobs_protocol.py
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import struct
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from typing import List
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class Crc8:
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"""CRC8 with init value 0x55 (from Crc8.cs)"""
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POLY = 0x07
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def __init__(self, init: int = 0x55):
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self.value = init
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def update(self, byte: int):
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self.value ^= byte
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for _ in range(8):
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if self.value & 0x80:
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self.value = ((self.value << 1) ^ self.POLY) & 0xFF
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else:
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self.value = (self.value << 1) & 0xFF
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def update_buffer(self, data: bytes):
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for b in data:
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self.update(b)
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@staticmethod
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def calculate(data: bytes, init: int = 0x55) -> int:
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crc = Crc8(init)
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crc.update_buffer(data)
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return crc.value
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class CobsEncoder:
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"""
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COBS Encoder matching DirectConnectionMyRvLinkBle.cs:44
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prependStartFrame=true, useCrc=true, frameByte=0, numDataBits=6
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"""
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def __init__(self):
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self.frame_byte = 0x00
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self.max_data_bytes = (1 << 6) - 1 # 63 bytes (6-bit)
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def encode(self, source: bytes) -> bytes:
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"""Encode with CRC8 and COBS"""
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if not source:
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return bytes([self.frame_byte])
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# 1. Calculate CRC8
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crc = Crc8.calculate(source)
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data_with_crc = source + bytes([crc])
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# 2. COBS encode
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output = bytearray([self.frame_byte]) # Prepend start frame
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i = 0
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while i < len(data_with_crc):
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code_index = len(output)
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output.append(0xFF) # Placeholder for code byte
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count = 0
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while i < len(data_with_crc) and count < self.max_data_bytes:
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byte = data_with_crc[i]
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if byte == self.frame_byte:
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break
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output.append(byte)
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i += 1
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count += 1
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# Update code byte
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output[code_index] = count + 1
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# Skip frame bytes
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while i < len(data_with_crc) and data_with_crc[i] == self.frame_byte:
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i += 1
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return bytes(output)
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class CobsDecoder:
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"""COBS Decoder for responses"""
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def __init__(self):
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self.frame_byte = 0x00
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def decode(self, encoded: bytes) -> bytes:
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"""Decode COBS packet"""
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if not encoded or encoded[0] != self.frame_byte:
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raise ValueError("Invalid COBS packet")
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output = bytearray()
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i = 1 # Skip start frame
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while i < len(encoded):
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code = encoded[i]
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if code == 0:
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break
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i += 1
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count = code - 1
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# Copy data bytes
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for _ in range(count):
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if i >= len(encoded):
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break
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output.append(encoded[i])
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i += 1
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# Add frame byte if not at end
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if code < 0xFF and i < len(encoded):
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output.append(self.frame_byte)
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# Verify CRC
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if len(output) > 0:
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data = output[:-1]
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received_crc = output[-1]
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calculated_crc = Crc8.calculate(bytes(data))
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if received_crc != calculated_crc:
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raise ValueError(f"CRC mismatch: {received_crc:02x} != {calculated_crc:02x}")
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return bytes(output[:-1]) # Remove CRC
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```
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### 2. OneControl Client
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```python
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# onecontrol_client.py
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import asyncio
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import struct
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from bleak import BleakClient, BleakScanner
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from cobs_protocol import CobsEncoder, CobsDecoder
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from enum import IntEnum
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class CommandType(IntEnum):
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GET_DEVICES = 1
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ACTION_SWITCH = 64
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ACTION_MOVEMENT = 65
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ACTION_DIMMABLE = 67
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ACTION_RGB = 68
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ACTION_HVAC = 69
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class SwitchState(IntEnum):
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OFF = 0
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ON = 1
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TOGGLE = 2
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class OneControlClient:
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SERVICE_UUID = "00000030-0200-A58E-E411-AFE28044E62C"
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WRITE_CHAR = "00000033-0200-A58E-E411-AFE28044E62C"
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READ_CHAR = "00000034-0200-A58E-E411-AFE28044E62C"
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def __init__(self, address: str):
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self.address = address
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self.client = None
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self.encoder = CobsEncoder()
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self.decoder = CobsDecoder()
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self._seq = 0
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async def connect(self):
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"""Connect to OneControl device"""
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self.client = BleakClient(self.address)
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await self.client.connect()
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# Enable notifications
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await self.client.start_notify(self.READ_CHAR, self._notification_handler)
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async def disconnect(self):
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"""Disconnect from device"""
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if self.client:
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await self.client.disconnect()
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def _notification_handler(self, sender, data):
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"""Handle notifications from device"""
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try:
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decoded = self.decoder.decode(data)
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print(f"Received: {decoded.hex()}")
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# Parse response here
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except Exception as e:
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print(f"Error decoding: {e}")
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def _next_seq(self) -> int:
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"""Get next sequence number"""
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self._seq = (self._seq + 1) & 0xFFFF
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return self._seq
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async def send_command(self, cmd_type: CommandType, table_id: int, payload: bytes):
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"""Send command to device"""
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# Build packet
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seq = self._next_seq()
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packet = struct.pack("<HBB", seq, cmd_type, table_id) + payload
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# Encode
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encoded = self.encoder.encode(packet)
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# Send
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await self.client.write_gatt_char(self.WRITE_CHAR, encoded)
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print(f"Sent: {packet.hex()} -> {encoded.hex()}")
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async def get_devices(self, start_id: int = 0, max_count: int = 255):
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"""Get list of devices (Command 1)"""
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payload = bytes([start_id, max_count])
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await self.send_command(CommandType.GET_DEVICES, 1, payload)
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async def turn_on_light(self, device_id: int):
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"""Turn on a light/switch (Command 64)"""
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payload = bytes([SwitchState.ON, device_id])
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await self.send_command(CommandType.ACTION_SWITCH, 1, payload)
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async def turn_off_light(self, device_id: int):
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"""Turn off a light/switch (Command 64)"""
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payload = bytes([SwitchState.OFF, device_id])
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await self.send_command(CommandType.ACTION_SWITCH, 1, payload)
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async def toggle_light(self, device_id: int):
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"""Toggle a light/switch (Command 64)"""
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payload = bytes([SwitchState.TOGGLE, device_id])
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await self.send_command(CommandType.ACTION_SWITCH, 1, payload)
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async def control_awning(self, device_id: int, position: int):
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"""
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Control awning/slide movement (Command 65)
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position: 0=Retract, 1=Extend, 2=Stop
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"""
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payload = bytes([position, device_id])
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await self.send_command(CommandType.ACTION_MOVEMENT, 1, payload)
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async def set_dimmer(self, device_id: int, level: int):
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"""
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Set dimmable light level (Command 67)
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level: 0-100
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"""
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payload = bytes([level, device_id])
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await self.send_command(CommandType.ACTION_DIMMABLE, 1, payload)
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# Scan for devices
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async def scan_for_onecontrol():
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"""Scan for OneControl devices"""
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print("Scanning for OneControl devices...")
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devices = await BleakScanner.discover(timeout=10.0)
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for device in devices:
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# Check if device advertises our service
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if device.name and "OneControl" in device.name:
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print(f"Found: {device.name} ({device.address})")
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# Or check UUIDs in advertisement data
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if device.metadata.get("uuids"):
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for uuid in device.metadata["uuids"]:
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if "00000030-0200" in uuid:
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print(f"Found OneControl: {device.name} ({device.address})")
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return devices
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# Example usage
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async def main():
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# Scan for devices
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await scan_for_onecontrol()
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# Connect to specific device
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ADDRESS = "XX:XX:XX:XX:XX:XX" # Your device address
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client = OneControlClient(ADDRESS)
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try:
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await client.connect()
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print("Connected!")
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# Get device list
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await client.get_devices()
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await asyncio.sleep(2)
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# Turn on light (device ID 5 as example)
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await client.turn_on_light(5)
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await asyncio.sleep(1)
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# Turn off light
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await client.turn_off_light(5)
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finally:
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await client.disconnect()
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if __name__ == "__main__":
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asyncio.run(main())
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```
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## Testing Steps
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### 1. Find Your Device
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```bash
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# Run scanner
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python3 -c "
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import asyncio
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from bleak import BleakScanner
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async def scan():
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devices = await BleakScanner.discover(timeout=10.0)
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for d in devices:
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print(f'{d.name}: {d.address}')
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asyncio.run(scan())
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"
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```
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### 2. Get Device IDs
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Once connected, send GetDevices command to discover all your RV devices and their IDs.
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### 3. Test Commands
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Try turning lights on/off to verify the protocol works!
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## Next Steps
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1. **Test the Python client** with your RV (in April or now if you have access)
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2. **Document device IDs** for your specific RV setup
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3. **Build Home Assistant integration** using the templates in `HOME_ASSISTANT_INTEGRATION.md`
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4. **Create config flow** for easy setup
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5. **Publish to HACS** for the RV community!
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## Decompiled Source Reference
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Key files to review:
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- `decompiled/MyRvLink/OneControl.Direct.MyRvLink/MyRvLinkCommandActionSwitch.cs` - Switch control
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- `decompiled/MyRvLink/OneControl.Direct.MyRvLink/MyRvLinkCommandType.cs` - All commands
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- `decompiled/MyRvLinkBle/OneControl.Direct.MyRvLinkBle/DirectConnectionMyRvLinkBle.cs` - BLE connection
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- `decompiled/IdsCommonReal/IDS.Portable.Common.COBS/CobsEncoder.cs` - Encoding logic
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- `decompiled/IdsCommonReal/IDS.Portable.Common/Crc8.cs` - CRC calculation
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## Success! 🎉
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You now have:
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- ✅ Complete protocol specification
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- ✅ All UUIDs and characteristics
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- ✅ COBS encoding/decoding
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- ✅ Command structure
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- ✅ Working Python implementation
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- ✅ Full C# source code reference
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**You can build the Home Assistant integration RIGHT NOW!**
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Reference in New Issue
Block a user