Esp32/esp32 neo pixel

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1. include <Adafruit_NeoPixel.h>

// Which pin on the Arduino is connected to the NeoPixels?

1. define PIN 8 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?

1. define NUMPIXELS 1 // Popular NeoPixel ring size

// When setting up the NeoPixel library, we tell it how many pixels, // and which pin to use to send signals. Note that for older NeoPixel // strips you might need to change the third parameter -- see the // strandtest example for more information on possible values. Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

1. define DELAYVAL 500 // Time (in milliseconds) to pause between pixels

void setup() {

 // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
 // Any other board, you can remove this part (but no harm leaving it):

1. if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)

 clock_prescale_set(clock_div_1);

1. endif

 // END of Trinket-specific code.

 pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)

}

void loop() {

 pixels.clear(); // Set all pixel colors to 'off'

 // The first NeoPixel in a strand is #0, second is 1, all the way up
 // to the count of pixels minus one.
 for(int i=0; i<255; i++) { // For each pixel...

   // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
   // Here we're using a moderately bright green color:
   pixels.setPixelColor(0, pixels.Color(0, i, 0));
   pixels.show();   // Send the updated pixel colors to the hardware.
   delay(DELAYVAL); // Pause before next pass through loop
 }

}