# Adafruit AHT20 Temperature & Humidity Sensor

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/139/087/medium800/temperature___humidity_a.png?1755549776 Rec C of the board, shown above, has a small trace in the upper left for disabling the "on" LED. Revisions A and B do not have this feature.)

The AHT20 is a nice but inexpensive temperature and humidity sensor [from the same folks that brought us the DHT22](https://www.adafruit.com/product/385). You can take sensor readings as often as you like, and it uses standard I2C so its super easy to use with any Arduino or Linux/Raspberry Pi board.  
  
This sensor has a typical accuracy of +- 2% relative humidity, and +-0.3 °C. There is only one I2C address so its not a good option when you need multiple humidity sensors.

![](https://cdn-learn.adafruit.com/assets/assets/000/139/088/medium800/temperature___humidity_b.png?1755549598)

As with all Adafruit breakouts, we've done the work to make this handy temperature-and-humidity super easy to use. We've put it on a breakout board with the required support circuitry and connectors to make it easy to work with and is now a trend we've added [SparkFun Qwiic](https://www.sparkfun.com/qwiic) compatible [**STEMMA QT**](https://learn.adafruit.com/introducing-adafruit-stemma-qt) JST SH connectors that allow you to get going  **without needing to solder.**  Just use a [STEMMA QT adapter cable](https://www.adafruit.com/product/4209), plug it into your favorite microcontroller or Blinka supported SBC and you're ready to rock!

![](https://cdn-learn.adafruit.com/assets/assets/000/091/687/medium800/temperature___humidity_AHT20_-_prod_P4566FrontHeader.jpg?1755549790 Rev B does not have the small jumper on the front for disabling the "on" LED.)

- [Next Page](https://learn.adafruit.com/adafruit-aht20/pinouts.md)

## Primary Products

### Adafruit AHT20 - Temperature & Humidity Sensor Breakout Board

[Adafruit AHT20 - Temperature & Humidity Sensor Breakout Board](https://www.adafruit.com/product/4566)
The AHT20 is a nice but inexpensive temperature and humidity sensor [from the same folks that brought us the DHT22](https://www.adafruit.com/product/385). You can take sensor readings as often as you like, and it uses standard I2C so its super easy to use with any Arduino or...

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[Related Guides to the Product](https://learn.adafruit.com/products/4566/guides)

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