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 - Analysis Guide
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## What We've Accomplished
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We successfully:
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1. ✅ Extracted the XAPK file
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2. ✅ Decompiled the Android APK
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3. ✅ Identified the Xamarin .NET assembly blob format (XABA v2.2)
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4. ✅ Located 434 .NET assemblies in the payload
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5. ✅ Identified key BLE service UUID
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6. ✅ Mapped RV control systems
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## Key Findings
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### Bluetooth Protocol
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- **Service UUID**: `c4570b0f-2eeb-428b-b55c-8fa225621e86`
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- **Library Used**: Plugin.BLE (Xamarin Bluetooth plugin)
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- **Protocol Type**: BLE GATT (Read/Write/Notify characteristics)
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### RV Systems Controlled
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- Awnings (extend/retract)
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- Lights (on/off, possibly dimming)
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- Water Pumps
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- Water Tank Sensors
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- Slide-outs
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- Heating Systems
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### Command Types
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From code analysis, the system uses:
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- `RelayBasicSwitch` - Simple on/off relays
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- `RelayBasicLatching` - Latching relays
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- `RelayMomentary` - Momentary/pulse relays
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- Message-based protocol with device IDs
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### Key Assemblies to Analyze
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The protocol implementation is in these DLLs:
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1. **OneControl.Direct.IdsCanAccessoryBle.dll** - BLE protocol for IDS CAN accessories
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2. **OneControl.Direct.MyRvLinkBle.dll** - MyRV Link BLE protocol
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3. **OneControl.dll** - Core OneControl library with device definitions
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4. **Plugin.BLE.dll** - BLE communication library
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5. **IDS.Portable.CAN.dll** - CAN bus protocol (if using CAN gateway)
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## Next Steps - Manual Analysis with ILSpy
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Since the Xamarin assemblies are in a complex format, here's how to analyze them manually:
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### Option 1: Use Android Studio APK Analyzer
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```bash
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# Install Android Studio, then:
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# File > Profile or Debug APK
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# Select: extracted/com.lci1.lippertconnect.apk
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# Navigate to lib/armeabi-v7a/libassemblies.armeabi-v7a.blob.so
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# Android Studio can sometimes extract these automatically
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```
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### Option 2: Use Online .NET Decompiler
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1. Go to: https://www.decompiler.com/
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2. Upload `arch_apk/lib/armeabi-v7a/libassemblies.armeabi-v7a.blob.so`
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3. Let it extract and decompile the assemblies
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4. Download the decompiled source code
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### Option 3: Use `pyaxmlparser` and manual extraction
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```bash
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pip3 install --user pyaxmlparser
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# Then write a custom Python script to parse XABA format
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```
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### Option 4: Recommended - BLE Sniffing When You Get Access
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When you have access to your camper in April, this is the FASTEST way:
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1. **Using nRF Connect App** (Easiest):
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- Install nRF Connect on your phone
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- Scan for your OneControl device
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- Connect and explore services/characteristics
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- Try writing values and observe what happens
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- Document the commands
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2. **Using Android HCI Snoop** (Most detailed):
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```bash
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# On your Android phone:
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# Settings > Developer Options > Enable Bluetooth HCI Snoop Log
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# Use the Lippert Connect app to control your RV
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# Control each system (lights, awnings, pumps, etc.)
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# Pull the log:
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adb pull /data/misc/bluetooth/logs/btsnoop_hci.log
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# Analyze with Wireshark:
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wireshark btsnoop_hci.log
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# Filter by: bluetooth.uuid == 0xc4570b0f
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```
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## What to Look For in ILSpy/Decompiled Code
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When you get the assemblies decompiled, search for:
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### 1. Characteristic UUIDs
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```csharp
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// Look for GUID/UUID definitions
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public static Guid ServiceUuid = new Guid("c4570b0f-2eeb-428b-b55c-8fa225621e86");
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public static Guid CharacteristicUuid = new Guid(...);
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```
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### 2. Command Building
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```csharp
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// Look for methods like:
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byte[] BuildCommand(DeviceType type, CommandType cmd, params)
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byte[] BuildRelayCommand(int deviceId, bool state)
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```
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### 3. Device IDs/Addressing
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```csharp
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// How devices are identified:
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enum DeviceType { Light = 0x01, Awning = 0x02, ... }
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class Device {
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int Id;
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DeviceType Type;
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}
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```
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### 4. Message Format
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```csharp
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// Packet structure:
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[StartByte][Length][Command][DeviceID][Data...][Checksum]
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```
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## Protocol Reverse Engineering Worksheet
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When analyzing, fill this out:
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### Message Structure
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```
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Byte 0: [?] # Start byte or length?
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Byte 1: [?] # Command type?
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Byte 2: [?] # Device ID?
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Byte 3-N: [?] # Data
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Byte N+1: [?] # Checksum/CRC?
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```
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### Known Commands (to discover)
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```
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Light On: [??][??][??]...
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Light Off: [??][??][??]...
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Awning Extend: [??][??][??]...
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Awning Retract: [??][??][??]...
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```
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### Device IDs (to discover)
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```
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Living Room Light: 0x??
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Kitchen Light: 0x??
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Awning: 0x??
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Water Pump: 0x??
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```
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## Building the Home Assistant Integration
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Once you have the protocol documented, creating the HA integration will be straightforward:
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### 1. Create Python Library
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```python
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# lippert_onecontrol/client.py
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import bleak
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class OneControlClient:
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SERVICE_UUID = "c4570b0f-2eeb-428b-b55c-8fa225621e86"
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CHAR_WRITE_UUID = "???" # From analysis
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CHAR_READ_UUID = "???" # From analysis
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async def send_command(self, device_id, command):
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# Build packet based on protocol
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packet = self._build_packet(device_id, command)
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await self.client.write_gatt_char(self.CHAR_WRITE_UUID, packet)
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```
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### 2. Home Assistant Custom Component
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Follow the structure in `HOME_ASSISTANT_INTEGRATION.md`
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## Resources
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- **ILSpy GUI**: Run `avaloniailspy` to open the GUI decompiler
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- **Bluetooth Spec**: https://www.bluetooth.com/specifications/specs/
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- **BLE GATT**: https://learn.adafruit.com/introduction-to-bluetooth-low-energy/gatt
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- **Home Assistant Dev**: https://developers.home-assistant.io/
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## Timeline
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- **Now - April**: Analyze assemblies, understand protocol from code
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- **April (with camper access)**: Verify protocol with BLE sniffing
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- **After verification**: Build Python library
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- **Final**: Create Home Assistant integration
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## Quick Reference
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### Files in this Project
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```
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PROTOCOL_FINDINGS.md - Initial reverse engineering findings
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HOME_ASSISTANT_INTEGRATION.md - HA integration plan
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ANALYSIS_GUIDE.md - This file
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next_steps.sh - Automated next steps script
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payload.bin - Extracted XABA assembly blob
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extracted_assemblies/ - Extracted DLL files (partial)
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decoded_apk/ - Decompiled Android resources
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decompiled/sources/ - Decompiled Java code
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```
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### Important Contact Info
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- **Lippert Support**: service@lci1.com
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- **Phone**: +1 432-LIPPERT
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- **Potential API docs**: Ask Lippert for developer documentation
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Good luck! Feel free to ask questions when you need help with the analysis.
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