在nodejs中传递javascript消息

有人能帮我怎么做吗？每次收到消息时，我都希望将消息从websocket传递到串行端口

var firmata = require('firmata');
var board = new firmata.Board('COM4');

var WebSocketServer = require('ws').Server;
var wss = new WebSocketServer({ port: 8081 });

wss.on('connection', function connection(websocket) {
    websocket.on('message', function incoming(message) {
    board.servoWrite(5, message); //This doesn't work but how do i send?
}

board.on("ready", function() {
  board.servoWrite(5, 0); // this works but i need the message from above which I cant access.

});

---

您应该在板准备好后添加侦听器

board.on("ready", function() {
    wss.on('connection', function connection(websocket) {
        websocket.on('message', function incoming(message) {
            board.servoWrite(5, message);
        });
    });
});

或者声明一个变量，告诉你它是否准备好了

var isReady = false;

board.on("ready", function() {
    isReady = true;
});

wss.on('connection', function connection(websocket) {
    websocket.on('message', function incoming(message) {
        if(isReady)
            board.servoWrite(5, message);
    });
});

---

这不是sytax的错误。。不得不补充

board.servoConfig(5, 0, 30);

我在代码中添加了如下内容：

var firmata = require('firmata');
var board = new firmata.Board('COM4',function(){

});

var WebSocketServer = require('ws').Server;
var wss = new WebSocketServer({ port: 8081 });

wss.on('connection', function connection(websocket) {
    websocket.on('message', function incoming(message) {
    board.servoConfig(5, 0, 30);
    board.servoWrite(5, message); //This doesn't work but how do i send?
}

board.on("ready", function() {
  board.servoWrite(5, 0); // this works but i need the message from above which I cant access.

});

---

顺序无关紧要，我想：我解决了问题，但非常感谢：我不得不打电话给board.servoConfig5，0，0；这是一个强制性的电话，没有它就无法工作：谢谢：你在哪里添加了这个？这有什么用？我没有时间检查文档。我在示例中看到了它，并猜测它丢失了。从简短的阅读，它说，它设置的映射度[0,30]->[0180]引脚5