I want to write a ESP32 code about automatically controlling the brightness of the Neopixel light bar

Projects Programming
1

I use the ESP32, want to write a code about automatically controlling the brightness of the Neopixel light bar
I try to sense LUX through BH1750 in the loop to write a value in the range of 300-400 so that the light bar can automatically adjust the light in this range, but I have been trying for a long time without success, please masters can help me look.

This is my code:


#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif

#define LED_PIN    15

#define LED_COUNT 40  
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
#include "BluetoothSerial.h" 
#include "analogWrite.h"
BluetoothSerial ESP_BT; 
int incoming,y,x,xin,i;
// setting PWM properties
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 12;
#include "BH1750.h"
#include "Wire.h"

BH1750 bh1750_a;
BH1750 bh1750_b;

void setup() {
  #if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
 x=50;
  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();            // Turn OFF all pixels ASAP
    strip.setBrightness(50);
    colorWipe(strip.Color(255,   255,   255), 50);
   // Set BRIGHTNESS to about 1/5 (max = 255)
// configure LED PWM functionalitites
ledcSetup(ledChannel, freq, resolution);
ESP_BT.begin("ESP32_Control");
// attach the channel to the GPIO to be controlled
  Serial.begin(115200);
  Wire.begin(5, 18);
  Wire1.begin(21, 22);
  bh1750_a.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x23, &Wire);
  bh1750_b.begin(BH1750::CONTINUOUS_HIGH_RES_MODE, 0x23, &Wire1);
}

int error_counter_1_a = 0;
int error_counter_2_a = 0;
int error_counter_1_b = 0;
int error_counter_2_b = 0;

void loop() {
  
  float light_level_a;
  if (bh1750_a.measurementReady()) {
    light_level_a = bh1750_a.readLightLevel();
  }
  float light_level_b;
  if (bh1750_b.measurementReady()) {
    light_level_b = bh1750_b.readLightLevel();
  }

  if (lround(light_level_a) == -1) {
    error_counter_1_a++;
  }
  if (lround(light_level_a) == -2) {
    error_counter_2_a++;
  }
  if (lround(light_level_b) == -1) {
    error_counter_1_b++;
  }
  if (lround(light_level_b) == -2) {
    error_counter_2_b++;
  }
  
  delay(1000);
  if(light_level_a>400)
{

x-=5;
strip.setBrightness(x);
}
else if(light_level_a<400)
{
x+=5;
strip.setBrightness(x);
}

  Serial.printf("A: %.0f lux %d:%d :: B: %.0f lux %d:%d\n", light_level_a,
                error_counter_1_a, error_counter_2_a, light_level_b,
                error_counter_1_b, error_counter_2_b);
}

void colorWipe(uint32_t color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...
    strip.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    strip.show();                          //  Update strip to match
                              //  Pause for a moment
  }
}
// decrease the LED brightness
2

Please edit your post and put the code in code tags.

3

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