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.