Bit-Tree Creativity - AHT20 Digital MEMS Temperature Humidity Sensor Module

AHT20 Temperature & Humidity Sensor

The AHT20 temperature and humidity sensor adopts a high‑precision MEMS chip with an I2C digital communication interface. It runs on 2.0V‑5.5V wide‑range supply voltage and measures temperature plus humidity concurrently. Featuring rapid response, outstanding measuring accuracy and long‑term operational stability, it suits environmental monitoring, smart home automation, maker STEM education and weather‑related DIY projects.

High‑Precision Temp & Humidity Readings

Straightforward I2C Bus Wiring

Wide Voltage Input & Low Power Draw

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Parameter Dimension	Specification Details
Product Model	A029
Product Weight	Cased weight: 11g; Bare PCB weight: 4g
Basic Information	AHT20 Temperature and Humidity Sensor (A029)
Supply Voltage	2.0–5.5V DC
Humidity Measurement Range	0~100%RH
Humidity Measurement Accuracy	±2%RH (at 25°C)
Humidity Resolution	0.024%RH
Temperature Measurement Range	-40~+85°C
Temperature Measurement Accuracy	±0.3°C
Temperature Resolution	0.01°C
Communication Interface	I2C signal
Pin Definition	Supply Voltage - VCC Power Ground - GND Serial Clock (Bidirectional) - SCL Serial Data (Bidirectional) - SDA

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