我正在尝试使用XYItemRenderer r = new XYStepAreaRenderer(XYStepAreaRenderer.AREA,…);
通过Arduino串行发送数据，但没有收到消息，也没有错误
这是我使用的春季启动应用程序
SpringSerialPortConnector和这个：
@RestController
public class arduino {
AbstractSpringSerialPortConnector ard;
@RequestMapping("/hh")
public void hh() throws NoSuchPortException, TooManyListenersException, IOException {
ard.connect();
ard.sendMessage("try");
}
static com.fazecast.jSerialComm.SerialPort chosenPort;
@RequestMapping(value="/get")
public String getdata() throws IOException {
SerialPort[] portNames =SerialPort.getCommPorts();
System.out.println(portNames[0]);
chosenPort =getCommPort("COM4");
System.out.println(chosenPort.getSystemPortName());
if(chosenPort.openPort()) {
// enter an infinite loop that sends text to the arduino
PrintWriter output = new PrintWriter(chosenPort.getOutputStream());
output.print("first try");
output.flush();
return "send ";
}
else {
// disconnect from the serial port
chosenPort.closePort();
return "dis"+chosenPort.getSystemPortName();
}
}
}