VanAccess BMS Monitor

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.