OBD-II Java API

This project is no longer fully maintained.

I have forked the project and will work on it as time permits, but it is not fully supported. I am using it for my own private applications. Roque

Before opening an issue or using this library, please take a look at the following resources:

• Understanding OBD
• The ELM327

• JDK 1.8 or newer
• Maven 3.3.9 or newer

mvn clean install

Run git clone in root folder of your application to get the project locally

cd /path/to/your/project
git clone [email protected]:roq3/obd-java-api.git

dependencies {
    implementation project(':obd-java-api')
}

After pairing and establishing Bluetooth connection to your ELM327 device..

...
// retrieve Bluetooth socket
socket = ...; // specific to the VM you're using (Java, Android, etc.)

// execute commands
try {
  new EchoOffCommand().run(socket.getInputStream(), socket.getOutputStream());
  new LineFeedOffCommand().run(socket.getInputStream(), socket.getOutputStream());
  new TimeoutCommand(125).run(socket.getInputStream(), socket.getOutputStream());
  new SelectProtocolCommand(ObdProtocols.AUTO).run(socket.getInputStream(), socket.getOutputStream());
  new AmbientAirTemperatureCommand().run(socket.getInputStream(), socket.getOutputStream());
} catch (Exception e) {
  // handle errors
}

As @dembol noted:

Have you checked your ELM327 adapter with Torque or Scanmaster to see if it works with your car? Maybe the problem is with your device?

Popular OBD diagnostic tools reset state and disable echo, spaces etc before protocol selection. Download some ELM327 terminal for android and try following commands in order:

ATD
ATZ
AT E0
AT L0
AT S0
AT H0
AT SP 0