initial commit

.gitignore

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+node_modules

app.js

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+var SerialPort = require("serialport").SerialPort;
+var serialport = new SerialPort("/dev/tty.usbmodem1421");
+serialport.on('open', function(){
+	console.log('Serial Port Opend');
+	serialport.on('data', function(data){
+		console.log(data[0]);
+	});
+});

package.json

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+{
+  "name": "Arduino Nodejs Serial Port Communication",
+  "version": "0.0.0",
+  "description": "Connecting Arduino to Nodejs using serial ports",
+  "main": "app.js",
+  "dependencies": {
+    "serialport": "^1.3.1"
+  },
+  "author": "Danial Khosravi",
+  "license": "ISC"
+}

serialport.ino

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+/*
+  Writing to Serial Port
+  Writes a digital input on pin 2 into the serial
+  
+  This example code is in the public domain.
+ */
+
+// digital pin 2 has a pushbutton attached to it.
+int pushButton = 2;
+
+// the setup routine runs once when you press reset:
+void setup() {
+  // initialize serial communication at 9600 bits per second:
+  Serial.begin(9600);
+  // make the pushbutton's pin an input:
+  pinMode(pushButton, INPUT);
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  // read the input pin:
+  int buttonState = digitalRead(pushButton);
+  // print out the state of the button into the serial port:
+  if(buttonState == HIGH){
+    Serial.write(1);
+  }else{
+    Serial.write(0);
+  }
+
+  // delay in between reads for stability
+  delay(1);        
+}
+
+
+