68 lines
3.0 KiB
C
68 lines
3.0 KiB
C
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////////////////////////////////////
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// DEVICE-SPECIFIC LED SERVICES //
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////////////////////////////////////
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struct DEV_LED : Service::LightBulb { // ON/OFF LED
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int ledPin; // pin number defined for this LED
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SpanCharacteristic *power; // reference to the On Characteristic
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DEV_LED(int ledPin) : Service::LightBulb(){ // constructor() method
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power=new Characteristic::On();
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this->ledPin=ledPin;
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pinMode(ledPin,OUTPUT);
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} // end constructor
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boolean update(){ // update() method
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digitalWrite(ledPin,power->getNewVal());
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return(true); // return true
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} // update
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};
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//////////////////////////////////
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// Here's the new code defining DEV_DimmableLED - changes from above are noted in the comments
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struct DEV_DimmableLED : Service::LightBulb { // Dimmable LED
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LedPin *ledPin; // NEW! Create reference to LED Pin instantiated below
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SpanCharacteristic *power; // reference to the On Characteristic
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SpanCharacteristic *level; // NEW! Create a reference to the Brightness Characteristic instantiated below
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DEV_DimmableLED(int pin) : Service::LightBulb(){ // constructor() method
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power=new Characteristic::On();
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level=new Characteristic::Brightness(50); // NEW! Instantiate the Brightness Characteristic with an initial value of 50% (same as we did in Example 4)
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level->setRange(5,100,1); // NEW! This sets the range of the Brightness to be from a min of 5%, to a max of 100%, in steps of 1% (different from Example 4 values)
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this->ledPin=new LedPin(pin); // NEW! Configures a PWM LED for output to the specified pin. Note pinMode() does NOT need to be called in advance
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} // end constructor
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boolean update(){ // update() method
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// Here we set the brightness of the LED by calling ledPin->set(brightness), where brightness=0-100.
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// Note HomeKit sets the on/off status of a LightBulb separately from its brightness, which means HomeKit
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// can request a LightBulb be turned off, but still retains the brightness level so that it does not need
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// to be resent once the LightBulb is turned back on.
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// Multiplying the newValue of the On Characteristic ("power", which is a boolean) with the newValue of the
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// Brightness Characteristic ("level", which is an integer) is a short-hand way of creating the logic to
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// set the LED level to zero when the LightBulb is off, or to the current brightness level when it is on.
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ledPin->set(power->getNewVal()*level->getNewVal());
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return(true); // return true
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} // update
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};
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//////////////////////////////////
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