Example code for 16 LED Ring

ampel-firmware/led_effects.cpp

@@ -28,9 +28,16 @@ const int NEOPIXELS_PIN = 23;
 const int NUMPIXELS = 12;
 //NOTE: One value has been prepended, to make calculations easier and avoid out of bounds index.
 const uint16_t CO2_TICKS[NUMPIXELS + 1] = { 0, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2200 }; // [ppm]
+// const uint16_t CO2_TICKS[NUMPIXELS + 1] = { 0, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1800, 2000, 2200 }; // [ppm]
 // For a given LED, which color should be displayed? First LED will be pure green (hue angle 120°),
 // last 4 LEDs will be pure red (hue angle 0°), LEDs in-between will be yellowish.
+// For reference, this python code can be used to generate the array
+//    NUMPIXELS = 12
+//    RED_LEDS = 4
+//    hues = [ (2**16-1) // 3 * max(NUMPIXELS - RED_LEDS - i, 0) // (NUMPIXELS - RED_LEDS) for i in range(NUMPIXELS) ]
+//    '{' + ', '.join([str(hue) + ('U' if hue else '') for hue in hues]) + '}; // [hue angle]'
 const uint16_t LED_HUES[NUMPIXELS] = { 21845U, 19114U, 16383U, 13653U, 10922U, 8191U, 5461U, 2730U, 0, 0, 0, 0 }; // [hue angle]
+// const uint16_t LED_HUES[NUMPIXELS] = { 21845U, 20024U, 18204U, 16383U, 14563U, 12742U, 10922U, 9102U, 7281U, 5461U, 3640U, 1820U, 0, 0, 0, 0 }; // [hue angle]
 Adafruit_NeoPixel pixels(NUMPIXELS, NEOPIXELS_PIN, NEO_GRB + NEO_KHZ800);
 
 namespace led_effects {