// NeoPixelBrightness
// This example will cycle brightness from high to low of
// three pixels colored Red, Green, Blue.  
// This demonstrates the use of the NeoPixelBrightnessBus 
// with integrated brightness support
//
// There is serial output of the current state so you can 
// confirm and follow along
//

#include <NeoPixelBrightnessBus.h> // instead of NeoPixelBus.h

const uint16_t PixelCount = 3; // this example assumes 3 pixels, making it smaller will cause a failure
const uint8_t PixelPin = 14;  // make sure to set this to the correct pin, ignored for Esp8266

#define colorSaturation 255 // saturation of color constants
RgbColor red(colorSaturation, 0, 0);
RgbColor green(0, colorSaturation, 0);
RgbColor blue(0, 0, colorSaturation);

// Make sure to provide the correct color order feature
// for your NeoPixels
NeoPixelBrightnessBus<NeoRgbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);

// you loose the original color the lower the dim value used
// here due to quantization
const uint8_t c_MinBrightness = 8; 
const uint8_t c_MaxBrightness = 255;

int8_t direction; // current direction of dimming

void setup()
{
    Serial.begin(115200);
    while (!Serial); // wait for serial attach

    Serial.println();
    Serial.println("Initializing...");
    Serial.flush();

    // this resets all the neopixels to an off state
    strip.Begin();
    strip.Show();

    direction = -1; // default to dim first
    
    Serial.println();
    Serial.println("Running...");

    // set our three original colors
    strip.SetPixelColor(0, red);
    strip.SetPixelColor(1, green);
    strip.SetPixelColor(2, blue);
  
    strip.Show();
}


void loop()
{
    uint8_t brightness = strip.GetBrightness();
    Serial.println(brightness);
    
    delay(100);

    // swap diection of dim when limits are reached
    //
    if (direction < 0 && brightness <= c_MinBrightness)
    {
      direction = 1;
    }
    else if (direction > 0 && brightness >= c_MaxBrightness)
    {
      direction = -1;
    }
    // apply dimming
    brightness += direction;
    strip.SetBrightness(brightness);

    // show the results
    strip.Show();
}