DEV-12887 datasheet(24/40 Pages) SPARKFUN

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ngly.

// the table input should have parameters 'r', 'g', and 'b'.

// This function will be called by the agent.

function setRGB(rgbValue)

{

bluePin.write(rgbValue.b/255.0);

redPin.write(rgbValue.r/255.0);

greenPin.write(rgbValue.g/255.0);

}

// setUser will print out to the log the name of the LED chang

// This function will be called by the agent.

function setUser(suspect)

{

server.log(suspect +" set the LEDs.");

}

// setTimer will turn the LEDs off after a specified number o

f seconds

// This function will be called by the agent.

function setTimer(time)

{

if (time != 0)

imp.wakeup(time, ledsOff); // Call ledsOff in 'time' s

econds.

}

///////////////////////////////////

// Important Agent Handler Stuff //

///////////////////////////////////

// Each object that the agent can send us needs a handler, whi

ch we define with

// the agent.on function. The first parameter in agent.on is

an identifier

// string which must be matched by the sending agent. The seco

nd parameter is

// the name of a function to be called. These functions are al

ready defined up

// above.

agent.on("led", setLed);

agent.on("rgb", setRGB);

agent.on("user", setUser);

agent.on("timer", setTimer);

//////////////////////

// Helper Functions //

//////////////////////

// ledsOff just turns all LEDs off.

function ledsOff()

{

ledPin.write(0);

redPin.write(0);

greenPin.write(0);

bluePin.write(0);

}

The key bit of new code in this example is the agent.on function call. Run

during the setup portion of the code, these function calls set up a handler

function to be called whenever the agent sends a specific string to the imp.

For example, the agent.on("led", setLed); functions says that whenever

a message tagged with an “led” string is received from the agent, call the

setLed() function.

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