Esp32/esp32 neo pixel
From Federal Burro of Information
< Esp32
#include <Adafruit_NeoPixel.h> // Which pin on the Arduino is connected to the NeoPixels? #define PIN 8 // On Trinket or Gemma, suggest changing this to 1 // How many NeoPixels are attached to the Arduino? #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); #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): #if defined(__AVR_ATtiny85__) && (F_CPU == 16000000) clock_prescale_set(clock_div_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 } }