Max and min brightness

ampel-firmware/led_effects.cpp

 #include "led_effects.h"
 
 #include "config.h"
+#include "web_config.h"
 #include "sensor_console.h"
 
 // Adafruit NeoPixel (Arduino library for controlling single-wire-based LED pixels and strip)
@@ -12,13 +13,6 @@
  * Configuration                                                 *
  *****************************************************************/
 namespace config {
-  const uint8_t max_brightness = MAX_BRIGHTNESS;
-#if defined(MIN_BRIGHTNESS)
-  const uint8_t min_brightness = MIN_BRIGHTNESS;
-#else
-  const uint8_t min_brightness = MAX_BRIGHTNESS;
-#endif
-  const uint8_t brightness_amplitude = config::max_brightness - config::min_brightness;
   const int kitt_tail = 3; // How many dimmer LEDs follow in K.I.T.T. wheel
   const uint16_t poor_air_quality_ppm = 1600; // Above this threshold, LED breathing effect is faster.
   bool display_led = true; // Will be set to false during "night mode".
@@ -36,10 +30,41 @@ namespace config {
   // LEDs >= 1600ppm will be pure red (hue angle 0°), LEDs in-between will be yellowish.
   const uint16_t led_hues[led_count] = { 21845U, 19114U, 16383U, 13653U, 10922U, 8191U, 5461U, 2730U, 0, 0, 0, 0 }; // [hue angle]
 #elif LED_COUNT == 16
-  const uint16_t co2_ticks[led_count + 1] = { 0, 500, 600, 700, 800, 900, 1000, 1100, 1200,
-                                              1300, 1400, 1500, 1600, 1700, 1800, 2000, 2200 }; // [ppm]
-  const uint16_t led_hues[led_count] = {21845U, 19859U, 17873U, 15887U, 13901U, 11915U, 9929U, 7943U,
-                                         5957U, 3971U, 1985U, 0, 0, 0, 0, 0}; // [hue angle]
+  const uint16_t co2_ticks[led_count + 1] = {
+      0,
+      500,
+      600,
+      700,
+      800,
+      900,
+      1000,
+      1100,
+      1200,
+      1300,
+      1400,
+      1500,
+      1600,
+      1700,
+      1800,
+      2000,
+      2200 }; // [ppm]
+  const uint16_t led_hues[led_count] = {
+      21845U,
+      19859U,
+      17873U,
+      15887U,
+      13901U,
+      11915U,
+      9929U,
+      7943U,
+      5957U,
+      3971U,
+      1985U,
+      0,
+      0,
+      0,
+      0,
+      0 }; // [hue angle]
 #else
 #  error "Only 12 and 16 LEDs rings are currently supported."
 #endif
@@ -95,7 +120,7 @@ namespace led_effects {
 
   void setupRing() {
     pixels.begin();
-    pixels.setBrightness(config::max_brightness);
+    pixels.setBrightness(*config::max_brightness);
     LEDsOff();
     sensor_console::defineIntCommand("led", turnLEDsOnOff, F("0/1 (Turns LEDs on/off)"));
     sensor_console::defineIntCommand("color", showColor, F("0xFF0015 (Shows color, specified as RGB, for debugging)"));
@@ -136,7 +161,7 @@ namespace led_effects {
   // Simulate a moving LED with tail. First LED starts at 0, and moves along a triangular function. The tail follows, with decreasing brightness.
   // Takes approximately 1s for each direction.
   void showKITTWheel(uint32_t color, uint16_t duration_s) {
-    pixels.setBrightness(config::max_brightness);
+    pixels.setBrightness(*config::max_brightness);
     for (int i = 0; i < duration_s * config::led_count; ++i) {
       showWaitingLED(color);
     }
@@ -165,7 +190,8 @@ namespace led_effects {
    */
   void breathe(int16_t co2) {
     static uint8_t breathing_offset = 0;
-    uint16_t brightness = config::min_brightness + pixels.sine8(breathing_offset) * config::brightness_amplitude / 255;
+    uint8_t brightness_amplitude = *config::max_brightness - *config::min_brightness;
+    uint16_t brightness = *config::min_brightness + pixels.sine8(breathing_offset) * brightness_amplitude / 255;
     pixels.setBrightness(brightness);
     pixels.show();
     breathing_offset += co2 > config::poor_air_quality_ppm ? 6 : 3; // breathing speed. +3 looks like slow human breathing.
@@ -178,13 +204,13 @@ namespace led_effects {
     if (!config::display_led) {
       return;
     }
-    pixels.setBrightness(config::max_brightness);
+    pixels.setBrightness(*config::max_brightness);
     for (int ledId = 0; ledId < config::led_count; ++ledId) {
       uint8_t brightness = getLedBrightness(co2, ledId);
       pixels.setPixelColor(ledId, pixels.ColorHSV(config::led_hues[ledId], 255, brightness));
     }
     pixels.show();
-    if (config::brightness_amplitude > 0) {
+    if (*config::max_brightness > *config::min_brightness) {
       breathe(co2);
     }
   }
@@ -196,7 +222,7 @@ namespace led_effects {
     static uint16_t wheel_offset = 0;
     static uint16_t sine_offset = 0;
     unsigned long t0 = millis();
-    pixels.setBrightness(config::max_brightness);
+    pixels.setBrightness(*config::max_brightness);
     while (millis() - t0 < duration_ms) {
       for (int i = 0; i < config::led_count; i++) {
         pixels.setPixelColor(i, pixels.ColorHSV(i * 65535 / config::led_count + wheel_offset));
@@ -216,7 +242,7 @@ namespace led_effects {
       return;
     }
     for (int i = 0; i < 10; i++) {
-      pixels.setBrightness(static_cast<int>(config::max_brightness * (1 - i * 0.1)));
+      pixels.setBrightness(static_cast<int>(*config::max_brightness * (1 - i * 0.1)));
       delay(50);
       pixels.fill(color::red);
       pixels.show();

ampel-firmware/web_config.cpp

@@ -272,11 +272,14 @@ namespace web_config {
 namespace config {
   // CSV
   uint16_t *csv_interval = &web_config::csvTimestepParam.value();
-  
+
   // Sensor
   uint16_t *measurement_timestep = &web_config::timestepParam.value(); // [s] Value between 2 and 1800 (range for SCD30 sensor).
   uint16_t *altitude_above_sea_level = &web_config::altitudeParam.value(); // [m]
   uint16_t *co2_calibration_level = &web_config::atmosphericCO2Param.value(); // [ppm]
   bool *auto_calibrate_sensor = &web_config::autoCalibrateParam.value(); // [true / false]
   float *temperature_offset = &web_config::temperatureOffsetParam.value(); // [K] Sign isn't relevant.
-}
\ No newline at end of file
+
+  uint8_t *max_brightness = &web_config::maxBrightnessParam.value();
+  uint8_t *min_brightness = &web_config::minBrightnessParam.value();
+}

ampel-firmware/web_config.h

@@ -18,6 +18,10 @@ namespace config {
   extern uint16_t *co2_calibration_level; // [ppm]
   extern bool *auto_calibrate_sensor; // [true / false]
   extern float *temperature_offset; // [K] Sign isn't relevant.
+
+  // LED
+  extern uint8_t *max_brightness;
+  extern uint8_t *min_brightness;
 }
 
 namespace web_config {