Ich habe ein Programm erstellt, das Daten an mein Arduino sendet, die erkennen, was gesendet wurde, und dann den richtigen Pin einschalten, je nachdem, welche Taste gedrückt wird.

Wenn ich die Arduino-Software von meinem Windows-Computer aus verwende, funktioniert die Arduino-Skizze einwandfrei. Ich kann jeden Pin ein- und ausschalten, indem ich entweder W A S oder D sende.

Beim Senden über einen Knoten blinkt die RX-LED auf dem Arduino, aber sonst passiert nichts.

Kann jemand helfen?

Node.js Programm:

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-Programm:

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);
}