串口无法正常工作？

Question

我制作了一个程序,将数据发送到我的arduino,检测发送的内容,然后根据按下的键打开正确的引脚.

当我从我的Windows计算机上使用arduino软件时,arduino草图工作正常,我可以通过发送WAS或D来打开和关闭每个引脚.

当通过节点发送时,arduino上的RX灯闪烁,但没有其他任何事情发生.

有人可以帮忙吗？

Node.js程序:

var httpServer = require('http').createServer(function(req, response){ /* Serve your static files */ })
httpServer.listen(8080);

var nowjs = require("now");
var everyone = nowjs.initialize(httpServer);

everyone.now.logStuff = function(msg){
    console.log(msg);
}

var SerialPort = require('serialport2').SerialPort;
var assert = require('assert');

var portName;

if (process.platform == 'win32') {
  portName = 'COM4';
} else if (process.platform == 'darwin') {
  portName = '/dev/cu.usbserial-A800eFN5';
} else {
  portName = '/dev/ttyUSB0';
}

var readData = '';
var sp = new SerialPort();

sp.on('close', function (err) {
  console.log('port closed');
});

sp.on('error', function (err) {
  console.error("error", err);
});

sp.on('open', function () {
  console.log('port opened... Press reset on the Arduino.');
});

sp.open(portName, {
  baudRate: 9600,
  dataBits: 8,
  parity: 'none',
  stopBits: 1,
  flowControl: false
});

everyone.now.forward = function() {
sp.write("w");
}

everyone.now.back = function() {
sp.write("s");
}

everyone.now.left = function() {
sp.write("a");
}

everyone.now.right = function() {
sp.write("d");
}

sp.on('data', function(data) {
  console.log(data.toString());
});

Arduino计划:

void setup(){
  Serial.begin(9600);
  Serial.write("READY");
  //Set all the pins we need to output pins
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop (){
  if (Serial.available() > 0) {

    //read serial as a character
    char ser = Serial.read();
    Serial.write(ser);
    //NOTE because the serial is read as "char" and not "int", the read value must be compared to character numbers
    //hence the quotes around the numbers in the case statement
    switch (ser) {
      case 'w':
        move(8);
        break;
      case 's':
        move(9);
        break;
      case 'a':
        move(10);
        break;
      case 'q':
        move(10);
        move(8);        
        break;
      case 'd':
        move(11);
        break;
      case 'e':
        move(11);
        move(8);
        break;
    }
  }
}

void move(int pin){
  Serial.print(pin);  
  digitalWrite(pin, HIGH);
  delay(1);
  digitalWrite(pin, LOW);
}

Answer 1

我最近涉足了这个问题.当Arduino从Arduino IDE以外的大多数东西接收串行通信时,它会自动重置.这就是您可以从IDE而不是node.js发送的原因.

我有一个Uno并在Reset和Ground之间放一个电容器.这是一个有关该主题的一些好信息的页面.
祝好运. http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection