TVduino

TVduino is a REST Server implemented on an Arduino. It is used for monitoring the state of a set-top box through its video output. The REST Server can be used as a library to create connected solutions with arduino.

To put in place this solution you will need:

• 1 Arduino
• 2 TinkerKit LDR Sensors (Can be substituted by a normal photoresistor)
• 1 Ethernet Shield

You can then fix the sensors to a TV using a box and There are three main routes implemented on the arduino REST, they can be accessed through 10.0.2.160:80

page	method	parameters	return
/video	GET	none	Readings of both sensors
/getlivestatus	POST	{"dt" : ms}	Transitions in the TV status
/status	POST	{"dt" : ms}	Current TV status
/zap	POST	{"ip_box" : "STB_IP" , "channel":"NChannel", "threshold":"LOW_THRESHOLD"}	Measures zapping time for a STB (dev)
/wakeup	POST	{"nplug" : "N_PLUG", "ip":"Ip_ePowerSwitch"}	Measures electrical wakeup time for a STB

Example: /getlivestatus

Request (POST):

{"dt":5000}

Reply:

{
  "result": [
    {
      "plage": 1400,
      "status": "LIVE",
      "avgvalue": 399.93,
      "avgderiv": 0.35
    },
    {
      "plage": 1900,
      "status": "BLACK",
      "avgvalue": 23.45,
      "avgderiv": 0.2
    },
    {
      "plage": 1700,
      "status": "LIVE",
      "avgvalue": 300.19,
      "avgderiv": 17.05
    }
  ]
}

Showing us that there were three transitions on the TV signal and the time it stayed in each state.

TVduino can also be easily customized to add different routes to your rest server and be used for different needs. To create new routes it is really simple:

void callback(EthernetClient *client, char args[]){
  client->println("{\"hello\":\"world\"}"); 
}

void setup() {
  Serial.begin(9600);
  myServer = new restServer(mac, ip, gateway, subnet,80);
  delay(1000);
  //create routes on our rest server
  myServer->addRoute("/test", GET, &callback);
}

void run(){
  myServer->serve();
}

Requires Timer Library and Arduino IDE