#17 Serial Modbus Slave for Android on Beaglebone Black

[Efecan]

Hi,

Thanks for this great api. I'm using it with an Beaglebone Black which runs on Android. I successfully used for ModBus TCP Slave app. It worked like a charm. Now I'm trying to use it for Modbus serial slave app. But I am having an error. I think the problem is portname. I'm not realy sure what to use as a portname. Here is the code I tried:

ModbusSerialListener listener = null;

SimpleProcessImage spi = null;
spi = new SimpleProcessImage();
spi.addRegister(new SimpleRegister(45));

spi.addRegister(new SimpleRegister(56));

spi.addDigitalOut(new SimpleDigitalOut(false));

spi.addDigitalOut(new SimpleDigitalOut(false));

ModbusCoupler.getReference().setProcessImage(spi);

ModbusCoupler.getReference().setMaster(false);

SerialParameters params = new SerialParameters();

params.setPortName("/dev/ttyO0");

params.setBaudRate(9600);

params.setDatabits(8);

params.setParity("None");

params.setStopbits(1);

params.setEncoding("ascii");

params.setEcho(false);

listener = new ModbusSerialListener(params);

listener.setListening(true);

ModbusCoupler.getReference().setUnitID(1);

Error: java.lang.NoClassDefFoundError: net.wimpi.modbus.net.SerialConnection

And I'm getting it at "listener = new ModbusSerialListener(params);" part.

[Julie Haugh]

It sounds like either you have a JAR that doesn't include the referenced class, or you aren't providing the gnu.io package that SerialConnection requires.