lock

Unlock a door wirelessly using your phone. Uses an Android app to send commands over UDP to and Arduino.

parts

• Arduino
• Arduino Wi-Fi Shield [1]
• Android phone (firmware around 23 or higher)
• Wi-Fi
• Motor (Arduino code is currently set up for 3 wire servo)
  [1]
  http://www.amazon.com/Arduino-WiFi-Shield/dp/B00MEKEBXG

build

To wire the Arduino connect the servo like this

Servo	Arduino
White	pin 9
Red	5v
Black	gnd

Make an enclosure. For our first one we mounted the servo on top of the deadbolt int a metal case. Alternatively, if you want to use the second case (work in progress), which is 3d printed:

• convert case/box.scad to stl
• print using replicatorG

install

• Patch your arduino library to use printf if needed (used in current version) using this guide http://playground.arduino.cc/Main/Printf
• open udp/udp.ino in the Ardiuno IDE, change the SSID and password to match yours. upload to Ardiuno.
• Open android app inside android/ folder using Android Studio. upload to phone by clicking the play symbol (for debug) or another way.

files

android/	android key app
udp/	arduino lock code
info/	presentations etc.
case/	scad file for 3d printed enclosure!

encryption

Working on using AES CBC.

[X] Send random IV

todo

• design nice case
• 3d print the case
• status led
• multi user?
• battery

useful tools

What	Why
Android Studio	dev and run android app
Arduino IDE	flash Arduino
OpenSCAD	3d model by programming
ReplicatorG	convert or send model to 3d printer

external docs

Android Developer
Arduino WiFI
OpenSCAD cheatsheet
There was a nice Android UDP guide on Google code, I saved it in
info/AndroidUDP.md

thanks

Thanks to Dr. Lin for the guidance and Marcus for the hardware