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Home / Computer Hardware, Monitors & Peripherals / TSL2561 Light-to-Digital Converter Light Intensity Sensor Module GY-2561

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Interface I2C
Operating Voltage 3.3V to 5V DC
Light Spectrum Visible and Infrared
Measurement Range 1 to 40,000 Lux
Module Dimensions 23 x 15 x 3 mm
Net Weight 3 grams
Operating Temperature -30°C to 70°C
Communication Protocol I2C Bus
Package Content 1 x Sensor Module
Microcontroller Compatibility Arduino, ESP32, Raspberry Pi

5 reviews

A

Anonymous

Apr 12, 2026

Rating: 3/5

Needs better documentation

Sensor works but finding libraries took some time. Would be nice to have a wiki link included in the package.

A

Anonymous

Apr 05, 2026

Rating: 5/5

Fast delivery and well packaged

Arrived quickly and protected well in anti-static bag. Module looks sturdy and pins are well soldered.

A

Anonymous

Mar 26, 2026

Rating: 5/5

Excellent light measurement

Used this for an automatic lighting system. Very responsive to changes in ambient light conditions.

A

Anonymous

Mar 23, 2026

Rating: 4/5

Good sensor, tricky wiring

Accuracy is great but pinout diagram was slightly hard to read initially. Once connected properly it works well.

A

Anonymous

Feb 10, 2026

Rating: 5/5

Perfect for my weather station

Works flawlessly with my ESP32 setup. Reading lux values is very straightforward and the data seems accurate compared to my phone sensor.

5 FAQ

Q: Can it measure sunlight directly?

A: It handles up to 40,000 Lux which covers direct sunlight conditions.

Q: Does it work with Raspberry Pi?

A: Yes, it is fully compatible with Raspberry Pi GPIO I2C pins.

Q: What is the I2C address?

A: The default address is 0x39 but can be changed via hardware pins.

Q: Is this 5V compatible?

A: Yes, it supports 3.3V to 5V logic levels safely.

Q: Which library should I use?

A: We recommend the Adafruit TSL2561 library for Arduino projects.

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