serialport_test_on_rpi3b.js

//npm i serialport
const SerialPort = require('serialport').SerialPort;
var port = new SerialPort({
    path: '/dev/ttyUSB0',
    baudRate: 9600, //波特率
    dataBits: 8, //数据位
    parity: 'none', //奇偶校验
    stopBits: 1, //停止位
    flowControl: false
}, false); // this is the openImmediately flag [default is true]

//指令监听
port.on('open', function () {
//    port.write('main screen turn on ', function (err) {
//        if (err) {
//            return console.log('Error on write: ', err.message);
//        }
//        console.log('send success');
//    });
    port.on('data', function (data) {
        console.log('data received: ' + data);
    });
});

//打开错误将会发出一个错误事件
port.on('error', function (err) {
    console.log('Error: ', err.message);
});