VanAccess BMS Monitor
Monitor LiFePO4 batteries and Victron devices over Bluetooth
hc51t Connectivity System
Screenshots
Description
VanAccess is an open-source Android app for monitoring LiFePO4 battery systems and power devices over Bluetooth Low Energy (BLE).
Features:
* Live BMS dashboard with state of charge, voltage, current, power, and temperature
* Individual cell voltage bar chart with min/max/delta highlighting
* Cycle count, state of health, protection flags, and FET status
* Victron SmartSolar MPPT charger monitoring via encrypted advertisements
* Victron Orion DC-DC converter monitoring
* Ai-Tanker switch panel relay control
* BLE device scanner with signal strength display
* Auto-reconnect with foreground service for background operation
* Debug tools: GATT dump, raw packet logging, manual hex commands
* Temperature display in Celsius or Fahrenheit
Supported protocols:
* JBD/Xiaoxiang BMS protocol (PowerQueen, LiTime, and other Chinese LiFePO4 batteries)
* Victron AES-128-CTR encrypted advertisement protocol
* Ai-Tanker switch panel GATT protocol
This app is read-only and never modifies BMS settings. It is not affiliated with any hardware manufacturer.
What’s new (1.2)
Build reproducibility fixes so F-Droid can verify releases. No functional changes.
Versions
Permissions
What the app asks the system for. Android only grants sensitive access after you confirm it.
- Bluetooth scanSearch for nearby Bluetooth devices.
- Bluetooth connectionConnect to paired Bluetooth devices.
- BLUETOOTH_ADVERTISE
- BluetoothConnect to Bluetooth devices.
- BLUETOOTH_ADMIN
- Precise locationDetermine the location via GPS.
- Approximate locationDetermine the location via the network.
- Foreground serviceKeep running in the background, visible in the status bar.
Show 2 more permissions
- FOREGROUND_SERVICE_CONNECTED_DEVICE
- bms.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
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