树莓派，Arduino，Node.js和串口

我试图从一个node.js服务器脚本与我的arduino谈话。

这是我的代码：

var app = require('express')() , server = require('http').createServer(app) , io = require('socket.io').listen(server) , SerialPort = require('serialport').SerialPort; //SERIAL var portName = '/dev/ttyACM0'; var sp = new SerialPort(); // instantiate the serial port. sp.open(portName, { // portName is instatiated to be COM3, replace as necessary baudRate: 115200, // this is synced to what was set for the Arduino Code dataBits: 8, // this is the default for Arduino serial communication parity: 'none', // this is the default for Arduino serial communication stopBits: 1, // this is the default for Arduino serial communication flowControl: false // this is the default for Arduino serial communication }); //SERVER server.listen(80, '127.0.0.5'); app.get('/', function (req, res){ res.sendfile(__dirname + '/index.html'); }); io.sockets.on('connection', function (socket){ socket.emit('test', { test: 'Its Working' }); socket.on('value', function (data){ console.log(data); }); }); 

我很确定我的设备是在/ dev / ttyACM0上，因为：

 pi@raspberrypi ~/Programming/node $ dmesg|tail [91569.773042] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device [91569.776338] usbcore: registered new interface driver cdc_acm [91569.776369] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters [92601.131298] usb 1-1.2: USB disconnect, device number 7 [92609.044999] usb 1-1.2: new full-speed USB device number 8 using dwc_otg [92609.149759] usb 1-1.2: New USB device found, idVendor=2341, idProduct=0043 [92609.149789] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=220 [92609.149806] usb 1-1.2: Manufacturer: Arduino (www.arduino.cc) [92609.149820] usb 1-1.2: SerialNumber: 74132343430351705051 [92609.156743] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device pi@raspberrypi ~/Programming/node $ 

当我尝试运行我的服务器脚本时出现错误：

 pi@raspberrypi ~/Programming/node $ node server.js info - socket.io started /home/pi/node_modules/serialport/serialport.js:72 throw new Error('Invalid port specified: ' + path); ^ Error: Invalid port specified: undefined at new SerialPort (/home/pi/node_modules/serialport/serialport.js:72:11) at Object.<anonymous> (/home/pi/Programming/node/server.js:8:10) at Module._compile (module.js:449:26) at Object.Module._extensions..js (module.js:467:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Module.runMain (module.js:492:10) at process.startup.processNextTick.process._tickCallback (node.js:244:9) 

我确定我只是缺less一些简单的东西，但是我对Linux或Node知之甚less。 我是否需要安装驱动程序的arduino IDE？ 是不是因为我在我的覆盆子pi，我知道这使用串口，​​但我想通过USB通信。 这是可能的或者我只有一个串口，不pipe是USB还是串口？

编辑我已经安装了IDE，我可以通过IDE与Arduino谈话。 所以这不是司机或港口的缺乏。

谢谢你的帮助。

乔

Answer 1

我想这是因为SerialPort空参数，你稍后在open中指定

 var sp = new SerialPort(); // instantiate the serial port. //then you open sp.open(portName, { // portName is instatiated to be COM3, replace as necessary 

从SerialPort npm项目页面

 var SerialPort = require("serialport").SerialPort var serialPort = new SerialPort("/dev/tty-usbserial1"); When opening a serial port, you can specify (in this order). 1. Path to Serial Port - required. 2. Options - optional and described below. 

所以你应该在SerialPort中指定所有的参数而不是打开

 var portName = '/dev/ttyACM0'; var sp = new SerialPort(portName, { baudRate: 115200, dataBits: 8, parity: 'none', stopBits: 1, flowControl: false }); 

Answer 2

我有一个工作nodeJS / arduino / Serialport机器人。

我用（你需要把你的串口改成你自己的）

  var serialport = require("serialport"); var SerialPort = serialport.SerialPort; // localize object constructor var sp = new SerialPort(comPort, { parser: serialport.parsers.readline("\r"), baudrate: 9600 }); sp.on("open", function () { sp.write(0x80); sp.write('123456\r'); console.log ("comm port ready"); }); 

记住当你写你的Arduino来“消耗”输出。 我的工作代码，我告诉机器人走在一个特定的方向。

  robotData.setLastCommand(direction); sp.write(direction , function(err, results) { **sp.drain(function(err, result){** //console.log ("drain"); //console.log(err, result); }); //console.log ("results -> " + results); });