What is it?

This is a compact SGP41 gas sensor breakout board with integrated SHT40 temperature and humidity sensor for real-time compensation. It detects VOC (volatile organic compounds) and NOx (nitrogen oxides) to provide reliable indoor air quality data. Designed with a Qwiic connector and wide 3.3–5 V supply range, it works seamlessly with Arduino, ESP32, Raspberry Pi, and other I²C-capable platforms.

Why did you make it?

I wanted an easy-to-use SGP41 module that beginners and makers can quickly integrate into projects without soldering or level-shifting issues. The onboard SHT40 ensures accurate measurements by compensating for environmental temperature and humidity changes.

What makes it special?

Compared to typical gas sensor breakouts, this board combines VOC/NOx sensing and precision humidity/temperature feedback in a single Qwiic-ready design. Its 3.3–5 V compatibility, small footprint, and pre-routed I²C interface make it ideal for air quality monitors, smart home devices, or scientific experiments with minimal wiring and maximum reliability.