The AHT20 is a nice but inexpensive temperature and humidity sensor from the same folks who brought us the DHT22. You can take sensor readings as often as you like, and it uses standard I2C so it's 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 at 20-80% RH and 20-60 °C. There is only one I2C address so it's not a good option when you need multiple humidity sensors.
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 it is now a trend we've added SparkFun Qwiic compatible STEMMA QT JST SH connectors that allow you to get going without needing to solder. Just use a STEMMA QT adapter cable, plug it into your favourite microcontroller or Blinka-supported SBC and you're ready to rock! QT Cable isNOT included.
Revision History:
As of Dec 10th, 2024- We're using the version of the sensor with a PTFE filter.
As of July 3, 2024- We've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen. You may get the new PCB or the older version with vector fonts; both are identical other than the fancy silkscreen.
Specifications
Use with 3.3V or 5V power/logic
I2C address 0x38
Operational Temperature range: -40 to 85 °C (+-1 °C typical accuracy over entire range)
Operational Relative Humidity range: 0 to 100 RH% (+-3 % typical accuracy over entire range)
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