Node.js错误Arduino串行监视器input
请帮助新手出去。
我试图学习Node.js，尝试通过串口连接一个正常工作的Arduino示例。 代码如下：
var serialport = require("serialport"); // include the serialport library var SerialPort = serialport.SerialPort; // localize object constructor var express = require('express'), app = express() , http = require('http') , server = http.createServer(app) , io = require('socket.io').listen(server); // listen for new web clients: server.listen(8080); // open the serial port. Change the name to the name of your port, just like in Processing and Arduino: var sp = new SerialPort("/dev/ttyACM0", { // look for return and newline at the end of each data packet: parser: serialport.parsers.readline("\r\n") }); // respond to web GET requests with the index.html page: app.get('/', function (req, res) { res.sendfile(__dirname + '/index.html'); }); // listen for new socket.io connections: io.sockets.on('connection', function (socket) { // if there's a socket client, listen for new serial data: sp.on('data', function (data) { // set the value property of scores to the serial string: scores.value = data; // for debugging, you should see this in Terminal: console.log(data); // send a serialdata event to the web client: socket.emit('serialEvent', scores); }); }); 代码执行成功与以下输出：
info - socket.io started debug - served static content /socket.io.js debug - client authorized info - handshake authorized Yh2i5KCqhagEnCIK41q3 debug - setting request GET /socket.io/1/websocket/Yh2i5KCqhagEnCIK41q3 debug - set heartbeat interval for client Yh2i5KCqhagEnCIK41q3 debug - client authorized for debug - websocket writing 1::
然后我input一些input到我的Arduino串行监视器，我的Node.js脚本崩溃，出现以下错误：
/home/sisko/NodeJS/nodeSerialServer/serialServer.js:49 scores.value = data; ^ ReferenceError: scores is not defined at SerialPort.<anonymous> (/home/sisko/NodeJS/nodeSerialServer/serialServer.js:49:3) at SerialPort.EventEmitter.emit (events.js:93:17) at parsers.readline (/home/sisko/NodeJS/nodeSerialServer/node_modules/serialport/serialport.js:36:17) at Array.forEach (native) at Object.parsers.readline [as parser] (/home/sisko/NodeJS/nodeSerialServer/node_modules/serialport/serialport.js:35:13) at process.nextTick.options.dataCallback (/home/sisko/NodeJS/nodeSerialServer/node_modules/serialport/serialport.js:89:15) at EventEmitter.emit (events.js:93:17) at ReadStream._emitData (fs.js:1365:10) at afterRead (fs.js:1347:10) at Object.wrapper [as oncomplete] (fs.js:362:17)
我将不胜感激一些帮助，因为我没有线索如何解决这个问题。
您需要定义分数variables并初始化它。
var express = require('express'), app = express(), http = require('http'), server = http.createServer(app), io = require('socket.io').listen(server), scores = {};