Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	GY-30
Sensor Chip	BH1750FVI
Communication Interface	I2C
Voltage Supply	3.3V - 5V DC
Measurement Range	1 - 65535 Lux
Resolution	1 Lux
Operating Temperature	-40°C to 85°C
Board Dimensions	16mm x 20mm
Weight	2.5g
Compatibility	Arduino, Raspberry Pi, ESP32

6 reviews

Anonymous

Mar 20, 2026

Rating: 5/5

Great for learning I2C

As a beginner, this was a fantastic component to learn how I2C communication works. Plenty of tutorials online specifically for the BH1750FVI chip used on this module.

Anonymous

Mar 19, 2026

Rating: 5/5

Ideal for plant monitoring

I'm using this to monitor light exposure for my indoor garden setup. The data logging is accurate enough to ensure my plants get the right amount of lumens daily.

Anonymous

Mar 14, 2026

Rating: 4/5

Good accuracy, small footprint

Works exactly as described. The board is very compact which helped fit it into my tight enclosure. Only giving 4 stars because the pin headers were not included, but that's minor.

Anonymous

Mar 12, 2026

Rating: 5/5

Reliable light sensing

I bought three of these for a smart lighting system. All three responded immediately upon connection. The range is impressive, handling both dim indoor light and bright sunlight without saturation issues.

Anonymous

Mar 08, 2026

Rating: 4/5

Solid performance

Used this on a mobile robot to detect ambient light levels for power saving modes. It reacts quickly to changes in lighting conditions. Very stable output.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for my weather station project

This sensor is incredibly easy to integrate with an Arduino. The I2C library works flawlessly, and the readings are consistent with my professional lux meter. Great value for the price.

5 FAQ

Q: How do I change the measurement resolution?

A: The resolution can be changed via software commands sent over the I2C bus. The datasheet provides specific hex codes to switch between High, Low, and Auto-resolution modes.

Q: Is there a library available for ESP32?

A: Absolutely. You can use the generic 'BH1750' library available in the Arduino Library Manager, which supports ESP32, ESP8266, and standard Arduino boards.

Q: Can this sensor measure UV index?

A: No, the BH1750FVI chip is designed to measure visible light intensity (Lux) only. It does not have the capability to measure UV radiation or UV index.

Q: Does this module work directly with 5V Arduino boards?

A: Yes, the GY-30 module operates on a voltage range of 3.3V to 5V, so it is fully compatible with 5V Arduino boards like the Uno and Mega without needing a level shifter.

Q: What is the maximum distance for the I2C connection?

A: For standard I2C communication, we recommend keeping the wire length under 30cm (approx. 1 foot) to ensure signal integrity. For longer distances, you may need an I2C extender or buffer.

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