java-obd-adapter - OBD-II Java Adapter API
AT Commands
Diagnostic Commands
<dependency>
<groupId>com.devesion.commons.obd</groupId>
<artifactId>obd-adapter</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency> private void invokeInitialCommands() {
invokeCommandQuietly(new ResetCommand());
invokeCommand(new SetEchoCommand(false));
invokeCommand(new SetLineFeedCommand(false));
invokeCommand(new SetHeadersCommand(false));
invokeCommand(new SetSpacesCommand(false));
invokeCommand(new AdaptiveTimeoutProtocolCommand());
invokeCommand(new SelectProtocolCommand());
}
private int readEngineRpm() {
EngineRpmCommand engineRpmCommand = new EngineRpmCommand();
invokeCommand(engineRpmCommand);
return engineRpmCommand.getValue().getIntValue();
}
private int readVehicleSpeed() {
SpeedCommand speedCommand = new SpeedCommand();
invokeCommand(speedCommand);
return speedCommand.getValue().getIntValue();
}
private float readThrottlePositionPercentage() {
ThrottlePositionCommand throttlePositionCommand = new ThrottlePositionCommand();
invokeCommand(throttlePositionCommand);
return throttlePositionCommand.getValue().getIntValue();
}
private double readMassAirFlow() {
MassAirFlowCommand massAirFlowObdCommand = new MassAirFlowCommand();
invokeCommand(massAirFlowObdCommand);
return massAirFlowObdCommand.getValue().getFloatValue();
}
private void invokeCommand(ObdCommand command) {
try {
CommandInvoker commandInvoker = createCommandInvoker();
log.info("invoking command {}", command);
commandInvoker.invoke(command);
} catch (Exception e) {
throw new DiagnosticStatusReadException(e);
}
}
private void invokeCommandQuietly(ObdCommand command) {
CommandInvoker commandInvoker = createCommandInvoker();
log.info("invoking command {}", command);
commandInvoker.invokeQuietly(command);
}
private CommandInvoker createCommandInvoker(InputStream inputStream, OutputStream outputStream) {
ObdLink obdLink = new ElmLink(inputStream, outputStream);
return new CommandInvoker(obdLink);
}