148 lines
8.6 KiB
C
148 lines
8.6 KiB
C
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////////////////////////////////////
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// DEVICE-SPECIFIC LED SERVICES //
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////////////////////////////////////
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#include "extras/PwmPin.h" // library of various PWM functions
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////////////////////////////////////
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struct DEV_DimmableLED : Service::LightBulb { // Dimmable LED
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// This version of the Dimmable LED Service is similar to the one last used in Example 11, but now includes support for 3 physical PushButtons
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// performing the following actions:
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//
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// power button: SHORT press toggles power on/off; LONG press sets brightness to 100% if power is on, or sets brightness to 5% if power is off
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// raise button: SHORT press increases brightness by 1%. LONG press increases brightness by 10%
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// lower button: SHORT press decreases brightness by 1%. LONG press decreases brightness by 10%
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PwmPin *pwmPin; // reference to PWM Pin
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int ledPin; // pin number defined for this LED
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int powerPin; // NEW! pin with pushbutton to turn on/off LED
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int raisePin; // NEW! pin with pushbutton to increase brightness
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int lowerPin; // NEW! pin with pushButton to decrease brightness
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int channel; // PWM channel used for this LED (should be unique for each LED)
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SpanCharacteristic *power; // reference to the On Characteristic
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SpanCharacteristic *level; // reference to the Brightness Characteristic
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// NEW! Consructor includes 3 additionl arguments to specify pin numbers for power, raise, and lower buttons
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DEV_DimmableLED(int channel, int ledPin, int powerPin, int raisePin, int lowerPin) : Service::LightBulb(){
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power=new Characteristic::On();
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level=new Characteristic::Brightness(50); // Brightness Characteristic with an initial value of 50%
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new SpanRange(5,100,1); // sets the range of the Brightness to be from a min of 5%, to a max of 100%, in steps of 1%
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// NEW! Below we create three SpanButton() objects. In the first we specify the pin number, as required, but allow SpanButton() to use
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// its default values for a LONG press (2000 ms) and a SHORT press (5 ms). In the second we change the LONG press time to 1000 ms, which
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// means we only have to hold the raise button for 1 second to trigger a LONG press that increases the brightness by 10%. In the the third,
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// we change both the LONG press time to 3000 ms (which means holding the button for 3 full seconds before releasing to decrease the brightness
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// by 10%), and the SHORT press time to 500 ms, which means holding down the button for at least half a second (but not longer than 3 seconds)
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// to derease the brightness by 1%. The logic for increasing/decreasing brightness, as well as turning on/off power, is found in the button()
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// method below. Note that in practice you likely would not use different combinations of parameters for buttons that perform similar types of
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// functions. We've only done so here to illustrate how the parameters work.
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new SpanButton(powerPin); // NEW! create new SpanButton to control power using PushButton on pin number "powerPin"
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new SpanButton(raisePin,1000); // NEW! create new SpanButton to increase brightness using PushButton on pin number "raisePin"
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new SpanButton(lowerPin,3000,500); // NEW! create new SpanButton to decrease brightness using PushButton on pin number "lowerPin"
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this->channel=channel; // save the channel number (from 0-15)
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this->ledPin=ledPin; // save LED pin number
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this->powerPin=powerPin; // NEW! save power pushbutton pin number
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this->raisePin=raisePin; // NEW! save increase brightness pushbutton pin number
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this->lowerPin=lowerPin; // NEW! save decrease brightness pushbutton pin number
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this->pwmPin=new PwmPin(channel, ledPin); // configure the PWM channel and attach the specified ledPin
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Serial.print("Configuring Dimmable LED: Pin="); // initialization message
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Serial.print(ledPin);
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Serial.print(" Channel=");
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Serial.print(channel);
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Serial.print("\n");
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} // end constructor
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StatusCode update(){ // update() method
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LOG1("Updating Dimmable LED on pin=");
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LOG1(ledPin);
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LOG1(": Current Power=");
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LOG1(power->getVal()?"true":"false");
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LOG1(" Current Brightness=");
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LOG1(level->getVal());
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if(power->updated()){
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LOG1(" New Power=");
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LOG1(power->getNewVal()?"true":"false");
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}
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if(level->updated()){
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LOG1(" New Brightness=");
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LOG1(level->getNewVal());
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}
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LOG1("\n");
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pwmPin->set(channel,power->getNewVal()*level->getNewVal());
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return(StatusCode::OK); // return OK status code
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} // update
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// NEW! Here is the button() method where all the PushButton actions are defined. Take note of the signature, and use of the word "override"
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void button(int pin, boolean isLong) override {
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LOG1("Found button press on pin: "); // always a good idea to log messages
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LOG1(pin);
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LOG1(" type: ");
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LOG1(isLong?"LONG":"SHORT");
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LOG1("\n");
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if(pin==powerPin && !isLong){ // if a SHORT press of the power PushButton...
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power->setVal(1-power->getVal()); // ...toggle the value of the power Characteristic
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} else
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if(pin==powerPin && isLong){ // if a LONG press of the power PushButton...
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if(power->getVal()) // ...and power Characteristic is true (LED is on)
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level->setVal(100); // set brightness level Characteristic to 100%
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else // ...else, power Characteristic is false (LED os off)
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level->setVal(5); // so set brightness level Characteristic to 5%
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} else
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if(pin==raisePin){ // if raise PushButton has been pressed
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int newLevel=level->getVal()+(isLong?10:1); // get current brightness level and increase by either 10% (LONG press) or 1% (SHORT press)
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if(newLevel>100) // don't allow new level to exceed maximium of 100%
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newLevel=100;
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level->setVal(newLevel); // set the value of the brightness Characteristic to this new level
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} else
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if(pin==lowerPin){ // if lower PushButton has been pressed
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int newLevel=level->getVal()-(isLong?10:1); // get current brightness level and decrease by either 10% (LONG press) or 1% (SHORT press)
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if(newLevel<5) // don't allow new level to fall below minimum of 5%
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newLevel=5;
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level->setVal(newLevel); // set the value of the brightness Characteristic to this new level
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}
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// Don't forget to set the new power and level for the actual LED - the above code by itself only changes the values of the Characteristics
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// within HomeKit! We still need to take an action on the actual LED itself.
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// Note the line below is similar to, but not the same as, the pwmPin->set function used in the update() method above. Within the
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// update() method we used getNewVal() because we wanted to change the LED to match the NEW VALUES requested by the user via the
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// HomeKit Controller. We did not need to (and must not) use setVal() to modify these values in the update() method since HomeSpan
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// automatically does this for us, provided we return StatusCode::OK at the end of the update() method.
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// But in the button() method, getNewVal() means nothing, since the button() method is not called by HomeKit in response to a user request
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// from a HomeKit Controller interface. Instead, we are manually changing the values of one or more Characteristic using setVal() in response
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// to LONG and SHORT PushButton requests. These changes are instantaneous, so we can retreive the new values with a subsequent call to getVal(),
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// as shown below. As usual, HomeSpan will send Event Notifications to all registered HomeKit Controllers letting them know about any changes
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// we made using setVal().
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pwmPin->set(channel,power->getVal()*level->getVal()); // update the physical LED to reflect the new values
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}
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};
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//////////////////////////////////
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