Turn on / off a led from an Android App to Arduino in Wifi

https://github.com/arduino-android/node-js

Android App => (wifi)=> Node Js server => (serial) => Arduino => (electrical) => led

• Android app send http request to the ip adress of the NodeJs server ( the laptop )

• NodeJs server receive the request and send a 0 or 1 to the arduino

• Arduino power on/off the led

• you need a router betwen your Phone and your nodejs server ( pc, raspeberry pi... )

a simple led circuit like that ( http://arduino.cc/en/Tutorial/Blink?from=Tutorial.BlinkingLED ) is connected to the pin 52 (digital ) of my Arduino mega 1280

Node js Server Instructions

• install node, npm, bower
• clone the node-js project
• npm install
• node index.js

Arduino Instructions

you can change the pin 52 in the arduino code you need to change the the serial port var serialPort = new SerialPort("/dev/tty.usbserial-A400fNZR"); /dev/tty.usbserial-A400fNZR should be the same that you use in arduino ( tools, serial port , /dev/tty.usbserial-A400fNZR )

Android

download it here https://play.google.com/store/apps/details?id=com.damien.holotestandroid.app or the code source is here : https://github.com/arduino-android/android