AHT20 Temperature and Humidity Sensor Breakout Board, I2C, 3.3V & 5V, Qwiic/STEMMA QT compatible

The AHT20 Temperature & Humidity Sensor Breakout Board is based on the high-precision AHT20 sensor and provides digital measurements for temperature and relative humidity via a standardized I²C interface. Thanks to SparkFun Qwiic / STEMMA QT compatible JST-SH connectors, the sensor can be used without any soldering and is ideal for maker, smart home, IoT, and microcontroller projects (Arduino, Raspberry Pi, ESP32, RP2040, etc.)

The board supports both 3.3V and 5V systems via I²C and is perfectly suited for environmental and climate monitoring, data logging, or weather station projects. The AHT20 sensor offers high accuracy in a compact form factor and delivers stable measurement results across the entire measurement range.

Highlights

• Digital temperature & humidity sensor with I²C output
• Qwiic / STEMMA QT compatible JST-SH 4-pin connector – fast, solder-free connection
• 3.3V & 5V tolerant – works with common microcontroller boards
• Temperature range: −40 °C to +85 °C (typ. ±0.3 °C)
• Humidity range: 0 % to 100 % RH (typ. ±2 % RH)
• I2C address: 0x38

Typical Applications

• Room and ambient monitoring
• Smart home climate & weather data acquisition
• IoT sensing (Raspberry Pi, ESP32, Arduino)
• Greenhouse or environmental monitoring
• Data logger projects

Technical Specifications