car/main.js

const net = require('net');
const PWM = require('/home/pi/Node.server/Contrl/index.js')
// socket Server
class netServer {
    constructor(HOST = '0.0.0.0', PORT = 6969) {
        // ----------SOCKET 服务-----------
        this.server = net.createServer((sock) => {
            console.log('client connected:', sock.remoteAddress, ':', sock.remotePort)
            sock.setEncoding('utf8')
            // 监听数据
            sock.on('data', (data) => {
                try {
                    const typeDb = JSON.parse(data)
                    if (typeDb.type == 'conctrl') {
                        PWM.changPWM(typeDb.data)
                    }
                } catch (error) {
                    console.log('错误', error);
                }
            })
            // 监听退出
            sock.on('end', () => {
                console.log('client disconnected')
            })
            // 监听错误
            sock.on('error', (err) => {
                let errcode = ''
                switch (err.code) {
                    case 'ECONNRESET':
                        errcode = '客户端断开'
                        break
                    default:
                        errcode = err.code
                        break
                }
                console.log(errcode)
            })
        })
        console.log('server listen: ' + HOST + ':' + PORT)
        this.server.maxConnections = 1
        this.server.listen(PORT, HOST)
    }
}
new netServer()