/*
 Kết nối:
    BH1750                 UNO                   MEGA
     VCC                3V3 or 5V              3V3 or 5V
     GND                   GND                   GND
     SCL                    A5                   SCL
     SDA                    A4                   SDA

    Mở Serial Monitor chọn No line ending, baud 9600.
*/

#include <Wire.h>
#include <BH1750.h>

BH1750 lightMeter;

void setup(){
  Serial.begin(9600);

  // Initialize the I2C bus (BH1750 library doesn't do this automatically)
  Wire.begin();
  // On esp8266 you can select SCL and SDA pins using Wire.begin(D4, D3);

  lightMeter.begin();

  Serial.println(F("BH1750 Test begin"));
}

void loop() {
  float lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}