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BH1750 GY-302 Light Sensor Module – Digital Lux, I2C, 3V to 5V – Soldered

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BH1750 GY-302 Light Sensor Module - Digital Lux, I2C, 3V to 5V - Soldered

Brand NZN Electronics CLICK IT SKU CLICK-IT-284880 Category Components

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  • Brand NZN Electronics

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Overview

A GY-302 light sensor board fitted with the BH1750 digital ambient light sensor, for measuring light levels in lux from an Arduino, ESP32 or Raspberry Pi. It runs from 3V to 5V, talks over I2C and gives a reading straight in lux from 1 to 65535, so there is no analogue maths or calibration to do. For direct sunlight or a wider range, see our VEML7700 ambient light sensor.

Specifications

Sensor chipBH1750FVI digital light sensor
Supply (VCC)3V to 5V, onboard 3.3V regulator
Works with5V Arduino and 3.3V ESP32, Pi
InterfaceI2C, address 0x23 or 0x5C
Range1 to 65535 lux, 1 lux steps
ResponseClose to the human eye, peak 560 nm
Reading time120 ms high resolution, 16 ms fast
PinsVCC, GND, SCL, SDA, ADDR
Board size18.5 x 13.9 mm, two 3 mm holes

Datasheets

Full technical datasheetPDF

What’s in the box

1×
GY-302 BH1750 light sensor board

Ships with a 5-pin 2.54 mm male header, loose and ready to solder. Jumper wires and the microcontroller are not included.

Great for

Turn on lights or a display backlight when the room gets dark
Log daylight levels in a greenhouse or shed
Check grow light or desk lamp brightness in lux
Close blinds or curtains when the sun gets strong
Add a light reading to an ESP32 weather station
Learn I2C sensors on an Arduino or ESP32

Wiring & getting started

  1. Solder the header

    Push the short ends of the 5-pin header through the board from the back, so the sensor faces up, and solder all five pins on the component side.

  2. Wire four pins

    VCC to 5V on an Uno or Nano, or 3V3 on an ESP32. GND to GND. SCL to A5 and SDA to A4 on an Uno or Nano, or GPIO22 and GPIO21 on an ESP32. Leave ADDR unconnected for address 0x23.

  3. Run the test sketch

    The datasheet has a short sketch that needs no library. Upload it and open the Serial Monitor at 115200 baud. It prints BH1750 found, then a reading in lux every second.

  4. Check it responds

    Cover the sensor with a finger and the reading drops towards 0. Shine a torch on it and it climbs.

Note: To use address 0x5C, connect ADDR to 3.3V, not 5V. The sensor chip runs at 3.3V from the onboard regulator, so ADDR must not go above 3.3V.

Specification

Specification for BH1750 GY-302 Light Sensor Module - Digital Lux, I2C, 3V to 5V - Soldered
CLICK IT SKU CLICK-IT-284880
Brand NZN Electronics

Features

A GY-302 light sensor board fitted with the BH1750 digital ambient light sensor, for measuring light levels in lux from an Arduino, ESP32 or Raspberry Pi. It runs from 3V to 5V, talks over I2C and gives a reading straight in lux from 1 to…

  • Brand NZN Electronics

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