GY-2561 TSL2561 Luminosity Sensor Light Intensity Module

The GY-2561 TSL2561 Luminosity Sensor Light Intensity Module is a high-precision digital light sensor that measures visible and infrared light to give a reliable lux reading similar to how the human eye perceives brightness.

Unlike basic photoresistors, the TSL2561 uses a digital I²C interface for stable, accurate data and supports programmable gain and integration time, making it suitable for both low-light and bright sunlight environments.

It’s ideal for Arduino, Raspberry Pi, ESP32, or any microcontroller project that needs to sense or adjust to ambient light conditions — from automatic lighting systems and display brightness control to environmental monitoring, IoT nodes, and robotic applications.

Features:

• Dual photodiodes for visible + infrared measurement

• Wide dynamic range (0.1 lux – 40,000+ lux)

• Programmable gain and integration time

• I²C digital output for easy connection to Arduino, Raspberry Pi, ESP32, etc.

• Compact and low-power design

Perfect for: smart lighting, plant growth monitoring, home automation, and weather stations.

Technical Specifications

Package Includes

• 1 × GY-2561 TSL2561 Luminosity Sensor Light Intensity Module

• 1 × Set of header pins (unsoldered)