HomeSpan/Other Examples/Pixel/Pixel.ino

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 *  Copyright (c) 2022 Gregg E. Berman
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 // HomeSpan Addressable RGB LED Example

// Demonstrates use of HomeSpan Pixel Class that provides for control of single-wire
// addressable RGB LEDs, such as the SK68xx or WS28xx models found in many devices,
// including the Espressif ESP32, ESP32-S2, and ESP32-C3 development boards.

#include "HomeSpan.h"
#include "extras/Pixel.h"                       // include the HomeSpan Pixel class

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

struct Pixel_Light : Service::LightBulb {      // Addressable RGB Pixel
 
  Characteristic::On power{0,true};
  Characteristic::Hue H{0,true};
  Characteristic::Saturation S{0,true};
  Characteristic::Brightness V{100,true};
  Pixel *pixel; 
  
  Pixel_Light(int pin) : Service::LightBulb(){

    V.setRange(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%
    pixel=new Pixel(pin);                     // creates pixel LED on specified pin using default timing parameters suitable for most SK68xx LEDs
    update();                                 // manually call update() to set pixel with restored initial values
  }

  boolean update() override {

    int p=power.getNewVal();
    
    float h=H.getNewVal<float>();       // range = [0,360]
    float s=S.getNewVal<float>();       // range = [0,100]
    float v=V.getNewVal<float>();       // range = [0,100]

    pixel->setHSV(h*p, s*p, v*p);       // sets pixel to HSV colors
          
    return(true);  
  }
};

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

struct Pixel_KnightRider : Service::LightBulb {      // Addressable RGB Pixel Strand of nPixel Pixels - Knight Rider Effect
 
  Characteristic::On power{0,true};
  Characteristic::Hue H{0,true};
  Characteristic::Saturation S{100,true};
  Pixel *pixel; 
  int nPixels;                                 
  uint32_t *colors;
  int phase=0;
  int dir=1;
  uint32_t alarmTime=0;
  
  Pixel_KnightRider(int pin, int nPixels) : Service::LightBulb(){

    pixel=new Pixel(pin);                     // creates pixel LED on specified pin using default timing parameters suitable for most SK68xx LEDs
    this->nPixels=nPixels;                    // store number of Pixels in Strand

    colors=(uint32_t *)calloc(2*nPixels-1,sizeof(uint32_t));   // storage for dynamic pixel pattern
    update();                                                  // manually call update() to set pixelk pattern with restored initial values
  }

  boolean update() override {

    if(!power.getNewVal()){
      pixel->setRGB(0,0,0,8);
    } else {
      float level=100;
      for(int i=0;i<nPixels;i++,level/=2.5){
        colors[nPixels+i-1]=pixel->getColorHSV(H.getNewVal<float>(),S.getNewVal<float>(),level);
        colors[nPixels-i-1]=colors[nPixels+i-1];
      }
    }
    
    return(true);  
  }

  void loop() override {

    if(millis()>alarmTime && power.getVal()){
      alarmTime=millis()+80;
      pixel->setColors(colors+phase,nPixels);
      if(phase==7)
        dir=-1;
      else if(phase==0)
        dir=1;
      phase+=dir;
    }
    
  }

};

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

void setup() {
  
  Serial.begin(115200);
 
  homeSpan.begin(Category::Lighting,"RGB Pixels");

  new SpanAccessory();
    new Service::AccessoryInformation();
      new Characteristic::Name("RGB Pixel");
      new Characteristic::Manufacturer("HomeSpan");
      new Characteristic::SerialNumber("123-ABC");
      new Characteristic::Model("SK68 LED");
      new Characteristic::FirmwareRevision("1.0");
      new Characteristic::Identify();

  new Service::HAPProtocolInformation();
    new Characteristic::Version("1.1.0");

  new Pixel_Light(8);                         // create single Pixel attached to pin 8
      
  new SpanAccessory();
    new Service::AccessoryInformation();
      new Characteristic::Name("Pixel Strand");
      new Characteristic::Manufacturer("HomeSpan");
      new Characteristic::SerialNumber("123-ABC");
      new Characteristic::Model("8-LED NeoPixel");
      new Characteristic::FirmwareRevision("1.0");
      new Characteristic::Identify();

  new Service::HAPProtocolInformation();
    new Characteristic::Version("1.1.0");

  new Pixel_KnightRider(1,8);               // create 8-Pixel Strand with Knight-Rider Effect attached to pin 1 

}

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

void loop() {
  homeSpan.poll();
}

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