GY302module(BH1750FVI) lux meter

GY302test.ino

/* GY-302(BH1750FVI) test
   Library: https://cmosgr.wordpress.com/2013/09/02/bh1750fvi-gy-302-light-sensor-module/
  
   ADDR - A3(GND)
   SDA - SDA(A4)
   SCL - SCL(A5)
   GND
   VCC
*/
#include <Wire.h>
#include <BH1750.h>

BH1750 lightMeter;

void setup(){
  pinMode(A3,OUTPUT); digitalWrite(A3,0);
  Serial.begin(9600);
  lightMeter.begin();
  Serial.println("Running…");
}

void loop() {
  uint16_t lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}