electric imp code for remote

Remote.js

// Connected Remote
// 
// code for a simple and fun remote - instructions for me get sent to my iPhone... wherever I am...!
// 3 simple buttons for 3 simple requests / instructions...
// * Cup of tea pelase!
// * Coffee time!
// * Home time!
//
// LED also fitted that flashes when a button is pressed
//
// side effect is a TMP36 which will monitor the temperature and log to cosm / xively
//

// code not final - could tidy up eg single fn with lambdas init for callbacks, needs power mgmt if battery powered

// Hardware connected at:
// Buttons on pins 2, 5, 9
// Green LED on pin 7
// Temperature sensor on pin 8

// globals
local id = hardware.getimpeeid();
local hwVoltage = hardware.voltage();
local countDown = 0;

// comms
local output_temperature = OutputPort("LoungeTemperature", "number");
local output_instruction = OutputPort("Instruction", "string");
local output_instruction1 = OutputPort("Instruction1", "string");
local output_instruction2 = OutputPort("Instruction2", "string");
local output_instruction3 = OutputPort("Instruction3", "string");

// Prowl
local my_apiKey = "add_here";
local my_application = "Lounge Remote"

// http only in beta so hardcode urls and send to 3 outputs... sigh... ;-)
//"https://api.prowlapp.com/publicapi/add?apikey=add_here&application=Lounge%20Remote&event=Cup%20of%20tea%20please%21"
//"https://api.prowlapp.com/publicapi/add?apikey=add_here&application=Lounge%20Remote&event=Coffee%20time%21"
//"https://api.prowlapp.com/publicapi/add?apikey=add_here&application=Lounge%20Remote&event=Home%20time...%21"

/*function Push(_apiKey, _application, _event)
{
    local url = "https://api.prowlapp.com/publicapi/add?"; 
    local query = { apikey = _apiKey, application = _application, event = _event };
    url += http.urlencode(query);

    server.log("Posting: " + url);
    local result = http.post(url, {}, "").sendsync();
    server.log(result.statuscode + ": " + result.body);
}*/

// Button fns
function readButtons()
{
    local btn1 = hardware.pin2.read();
    local btn2 = hardware.pin5.read();
    local btn3 = hardware.pin9.read();
    server.log(format("%d, %d, %d", btn1, btn2, btn3));
}

function getMessage(btnId)
{
    if(btnId == 1)
    {
        output_instruction1.set("T");
        return "Cup of tea please!";
    }
    if(btnId == 2)
    {
        output_instruction2.set("C");
        return "Coffee time!";        
    }
    else if(btnId == 3)
    {
        output_instruction3.set("H");
        return "Home time...!"
    }
}

function btnChanged(btnId, btnState)
{
    // if buttonState is 0, the button is pushed
    if (btnState == 0) 
    {
        server.log(format("Button %d Pressed!", btnId));
        output_instruction.set(getMessage(btnId));
        //Push(my_apiKey, my_application, getMessage(btnId));
        if(countDown > 0)
        {
            countDown = 10;
        }
        else
        {
            countDown = 10;
            blink();
        }
    }
    else 
    {
        server.log(format("Button %d Released!", btnId));
    }
}
function pin2changed()
{
    local btnState = hardware.pin2.read();
    btnChanged(1, btnState);
}
function pin5changed()
{
    local btnState = hardware.pin5.read();
    btnChanged(2, btnState);
}
function pin9changed()
{
    local btnState = hardware.pin9.read();
    btnChanged(3, btnState);
}

// LED fns
ledState <- 0;

function blink()
{
    if(countDown > 0)
    {   
        ledState = ledState?0:1;
        hardware.pin7.write(ledState);
        countDown--;
    
        imp.wakeup(0.1, blink);
    }
    else
    {
        hardware.pin7.write(1);
    }
}

// temperature fns

// read temperature sensor
function readTemperature()
{
    local rawValue = hardware.pin8.read();
    local voltage = hwVoltage * rawValue / 65535.0;
    // using TMP36: resolution is 10 mV / degree centigrade 
    //(500 mV offset) to make negative temperatures an option
    local realTemp = (voltage - 0.5) * 100.0;
    server.log(format("%3.1fC", realTemp));
    output_temperature.set(realTemp);
}

// main loop
function mainLoop()
{
    readTemperature();
    
    //readButtons();

    imp.wakeup(60.0, mainLoop);
}

server.log(id);
server.log("Configuring app: Remote...");

// buttons
hardware.pin2.configure(DIGITAL_IN_PULLUP, pin2changed);
hardware.pin5.configure(DIGITAL_IN_PULLUP, pin5changed);
hardware.pin9.configure(DIGITAL_IN_PULLUP, pin9changed);

// leds
hardware.pin7.configure(DIGITAL_OUT);

// temperature sensor
hardware.pin8.configure(ANALOG_IN);

server.log(format("Running at %.2f V", hwVoltage));

// and configure
imp.configure("Remote", [], [output_instruction, output_temperature, output_instruction1, output_instruction2, output_instruction3]);
server.log("Connected to Remote.");
// LEDs off
hardware.pin7.write(1);

// and go
mainLoop();

// EOF