var transport = NettyTcpClientTransport.create(cfg -> {
  cfg.setHostname("172.17.0.2");
  cfg.setPort(502);
});

var client = ModbusTcpClient.create(transport);
client.connect();

ReadHoldingRegistersResponse response = client.readHoldingRegisters(
    1,
    new ReadHoldingRegistersRequest(0, 10)
);

System.out.println("Response: " + response);

byte[] responsePdu = client.sendRaw(1, new byte[] {(byte) 0x5A, 0x00, 0x01});

var transport = SerialPortClientTransport.create(cfg -> {
  cfg.setSerialPort("/dev/ttyUSB0");
  cfg.setBaudRate(115200);
  cfg.setDataBits(8);
  cfg.setParity(SerialPort.NO_PARITY);
  cfg.setStopBits(SerialPort.TWO_STOP_BITS);
});

var client = ModbusRtuClient.create(transport);
client.connect();

client.readHoldingRegisters(
    1,
    new ReadHoldingRegistersRequest(0, 10)
);

System.out.println("Response: " + response);