The BH1750 GY-302 module is a digital light sensor that can be connected with I2C Protocol to detect the Light Ambient at a High resolution. 1 – 65535 lux (lx).

Features

1) I2C Protocol interface

2) Light Ambient to Digital Converter

3) High resolution. ( 1 – 65535 lx )

4) Low Current consumption with power-saving function

5) 50Hz / 60Hz Light noise reject-function

6) 1.8V Logic input interface

7) No need for any external parts

8) Light source dependency is little. 

9) 2x I2C slave-address available.

10) Small measurement variation (+/- 20%)

11) The infrared effect is very small on the reading.

Pinout Configuration of the Sensor:

GY-302 BH1750 Light Sensor Wiring Connections With Arduino:

Arduino Code for GY-302 BH1750 Light Sensor:

First, you need to download the Arduino Library for BH1750 Light Sensor by Clicking Here.

// Arduino and GY-302 module

#include 
#include 

BH1750 GY302; // initialize BH1750 object

void setup() {
Serial.begin(9600); // initialize serial
GY302.begin(); // initialize GY-302 module
}

void loop() {

// get reading from module
uint16_t lux = GY302.readLightLevel();

// display to Serial Monitor
Serial.print("Light: ");
Serial.print(lux);
Serial.println(" lx");

// pause for 1 second
delay(1000);
}

First, you need to download the Datasheet of the BH1750 Light Sensor by Clicking Here.