Ambient light shield and LED shield for D1 Pro Mini

ambient_led.ino

/*************************************************************
Wemos Lolin D1 PRO (ESP8266)
Basic demo
by Petr Lukas
*************************************************************/

// Install Adafruit_NeoPixel library https://github.com/adafruit/Adafruit_NeoPixel first
#include <Adafruit_NeoPixel.h>
#include <Wire.h>

// Install [claws/BH1750 Library](https://github.com/claws/BH1750) first
#include <BH1750.h>

#define PIN     D4
#define LED_NUM 7

Adafruit_NeoPixel leds = Adafruit_NeoPixel(LED_NUM, PIN, NEO_GRB + NEO_KHZ800);
BH1750 lightMeter(0x23);

void setup() {
  Serial.begin(9600);
  
  leds.begin(); // This initializes the NeoPixel library.
  
  Wire.begin();
  if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
    Serial.println(F("BH1750 Advanced begin"));
  }
  else {
    Serial.println(F("Error initialising BH1750"));
  }
}


void led_set(uint8 R, uint8 G, uint8 B) {
  for (int i = 0; i < LED_NUM; i++) {
    leds.setPixelColor(i, leds.Color(R, G, B));
    leds.show();
    delay(10);
  }
}

void loop() {
  uint16_t lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  
  // Tune sensitivity/response of LED shield by your needs. By default it reacts for changes between 0 and 255 lx
  int intens = 255 - lux;
  if(intens > 255) intens = 255;
  if(intens < 0) intens = 0;
   
  led_set(intens, 0, 0); // Red color by default
  delay(200);
}