Real-time notification of room occupancy, using a wifi-enabled microcontroller and PIR sensor and a NodeJS-powered websockets-enabled Web Application.
Tested with the following:
- Arduino Duemilanove ATmega328
(http://arduino.cc/en/Main/arduinoBoardDuemilanove/) - CuHead WiFi shield Version 2.0 (http://store.linksprite.com/cuhead-wifi-shield-v2-0-for-arduino/)
- Wide Angle PIR Sensor ST-00081 (http://shopsimplytronics.com/wide-angle-pir-sensor/)
TODO
Requires Arduino software app/
You must change the following variables in app/sketch/sketch.ino
// The IP address of the server
// Unfortunately, DNS is not supported
uint8 ip[] = { 192,168,1,3 };
// The port the server is listening on
int port = 8081;
// The local IP assigned tp the device (this may not be needed)
// Unfortunately, DHCP is not supported
unsigned char local_ip[] = { 192,168,1,2 };
// The IP of the router or gateway on the local network
unsigned char gateway_ip[] = { 192,168,1,1 };
// Subnet mask for local network
unsigned char subnet_mask[] = { 255,255,255,0 };
// Wifi network name
// NOTE: Only 802.11b is supported
const prog_char ssid[] PROGMEM = { "YOUR_NETWORK_SSID" };
// Network security
// OPEN: 0 | WEP: 1 | WPA: 2 | WPA2: 3
unsigned char security_type = 3;
// WPA/WPA2 passphrase
const prog_char security_passphrase[] PROGMEM = { "YOUR_NETWORK_KEY" };
// Access point network (usual): 1
// Adhoc network: 2
unsigned char wireless_mode = 1;server/
Running the server requires NodeJS.
Change to the server directory
cd server
Just once, install modules.
npm install
Start the server
node app.js
Server runs on port 8081.
It listens for POST /:room requests from the Arduino.
Also, it serves the web application from server/public.
Currently this is a single page app: GET localhost:8081 will serve server/public/index.html.
server/public
Uses Twitter bootstrap, jQuery & socket.io.
Andrew's Macbook IP: 10.128.0.224 MAC: 28:cf:e9:20:3c:eb
CuHead Wifi IP: 10.128.0.181 MAC: 00:1e:c0:04:ca:e1
To change OSX MAC
sudo ifconfig en0 ether XX:XX:XX:XX:XX:XX