led_effects.cpp

#include "led_effects.h"
/*****************************************************************
 * Configuration                                                 *
 *****************************************************************/
namespace config {
  const uint8_t max_brightness = MAX_BRIGHTNESS;
  const uint8_t min_brightness = MIN_BRIGHTNESS;
  const int kitt_tail = 3; // How many dimmer LEDs follow in K.I.T.T. wheel
}

/*****************************************************************
 * Configuration  (calculated from above values)                 *
 *****************************************************************/
namespace config //NOTE: Use a class instead? NightMode could then be another state.
{
  const uint8_t brightness_amplitude = config::max_brightness - config::min_brightness;
  bool night_mode = false;
}

#if defined(ESP8266)
// NeoPixels on GPIO05, aka D1 on ESP8266.
const int NEOPIXELS_PIN = 5;
#elif defined(ESP32)
// NeoPixels on GPIO23 on ESP32. To avoid conflict with LoRa_SCK on TTGO.
const int NEOPIXELS_PIN = 23;
#endif

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]
// 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.
const uint16_t LED_HUES[NUMPIXELS] = { 21845, 19114, 16383, 13653, 10922, 8191, 5461, 2730, 0, 0, 0, 0 }; // [hue angle]
Adafruit_NeoPixel pixels(NUMPIXELS, NEOPIXELS_PIN, NEO_GRB + NEO_KHZ800);

namespace LedEffects {
  //On-board LED on D4, aka GPIO02
  const int ONBOARD_LED_PIN = 2;

  void setupOnBoardLED() {
    pinMode(ONBOARD_LED_PIN, OUTPUT);
  }

  void onBoardLEDOff() {
    //NOTE: OFF is LOW on ESP32 and HIGH on ESP8266 :-/
#ifdef ESP8266
    digitalWrite(ONBOARD_LED_PIN, HIGH);
#else
    digitalWrite(ONBOARD_LED_PIN, LOW);
#endif
  }

  void onBoardLEDOn() {
#ifdef ESP8266
    digitalWrite(ONBOARD_LED_PIN, LOW);
#else
    digitalWrite(ONBOARD_LED_PIN, HIGH);
#endif
  }

  void LEDsOff() {
    pixels.clear();
    pixels.show();
    onBoardLEDOff();
  }

  void setupRing() {
    pixels.begin();
    pixels.setBrightness(config::max_brightness);
    LEDsOff();