Java物联网硬件开发教程：实现智能电梯控制功能

import jssc.SerialPort;
import jssc.SerialPortException;

public class ElevatorController {
    private static final String PORT_NAME = "COM3";
    private static final int BAUD_RATE = 9600;
    private static final byte OPEN_COMMAND = 1;
    private static final byte CLOSE_COMMAND = 2;
    private static final byte GO_TO_FLOOR_COMMAND = 3;

    private static SerialPort serialPort;

    public static void main(String[] args) {
        serialPort = new SerialPort(PORT_NAME);
        try {
            serialPort.openPort();
            serialPort.setParams(BAUD_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
            
            // 调用相应的方法控制电梯
            openElevator();
            closeElevator();
            goToFloor(5);

            serialPort.closePort();
        } catch (SerialPortException e) {
            e.printStackTrace();
        }
    }

    private static void openElevator() throws SerialPortException {
        byte[] command = {OPEN_COMMAND};
        serialPort.writeBytes(command);
    }

    private static void closeElevator() throws SerialPortException {
        byte[] command = {CLOSE_COMMAND};
        serialPort.writeBytes(command);
    }

    private static void goToFloor(int floor) throws SerialPortException {
        byte[] command = {GO_TO_FLOOR_COMMAND, (byte) floor};
        serialPort.writeBytes(command);
    }
}