VanAccess BMS Monitor

Monitor LiFePO4 batteries and Victron devices over Bluetooth

New in version 1.2

Build reproducibility fixes so F-Droid can verify releases. No functional changes.

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.

Author: hc51t
License: GNU General Public License v3.0 or later
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Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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Version 1.2 (3) suggested Added on Jul 31, 2026

This version requires Android 8.0 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- access approximate location only in the foreground
  
  This app can get your approximate location from location services while the app is in use. Location services for your device must be turned on for the app to get location.
- access precise location only in the foreground
  
  This app can get your precise location from location services while the app is in use. Location services for your device must be turned on for the app to get location. This may increase battery usage.
- pair with Bluetooth devices
  
  Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
- access Bluetooth settings
  
  Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
- advertise to nearby Bluetooth devices
  
  Allows the app to advertise to nearby Bluetooth devices
- connect to paired Bluetooth devices
  
  Allows the app to connect to paired Bluetooth devices
- discover and pair nearby Bluetooth devices
  
  Allows the app to discover and pair nearby Bluetooth devices
- run foreground service
  
  Allows the app to make use of foreground services.
- run foreground service with the type "connectedDevice"
  
  Allows the app to make use of foreground services with the type "connectedDevice"
- com.vanaccess.bms.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 5 MiB PGP Signature | Build Log

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