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ELM327 Emulator

OBD-II ELM327 adapter emulator for testing diagnostic apps
Simulates an ELM327 OBD-II interface over Bluetooth/BLE/network.
Useful for development and testing without a real vehicle.
Support many protocols CAN, KWP2000, ... any supported by ELM327.
Support OBD-II messages.
Track what have been sent by the scantool using the log.

Versions

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 19 (19) suggested Added on Apr 22, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • 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
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • com.github.autodiag2.elm327emu.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 17 MiB PGP Signature | Build Log

  • New in version 18
    - fix issues
    - rename app
  • Version 18 (18) - Added on Mar 18, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 9.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • 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
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • com.github.autodiag2.elm327emu.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 12 MiB PGP Signature | Build Log