WipperSnapper is an interface for Adafruit IO, Adafruit's incredibly easy-to-use IoT platform, designed to turn any WiFi-capable board into an IoT device without writing a single line of code. It's especially useful to quickly test out sensors and quickly build internet-enabled projects.

If you've never used WipperSnapper, click below to read through the quickstart guide before continuing.


First, wire up an AHT20 to your board exactly as follows. Here is an example of the AHT20 wired to an Adafruit ESP32 Feather V2 using I2C with a STEMMA QT cable (no soldering required)

  • Board 3V to sensor VIN (red wire on STEMMA QT)
  • Board GND to sensor GND (black wire on STEMMA QT)
  • Board SCL to sensor SCL (yellow wire on STEMMA QT)
  • Board SDA to sensor SDA (blue wire on STEMMA QT)


Connect your board to Adafruit IO Wippersnapper and navigate to the WipperSnapper board list.

On this page, select the WipperSnapper board you're using to be brought to the board's interface page.

If you do not see your board listed here - you need to complete the setup page for your board first and ensure it connects to Adafruit IO.

On the device page, quickly check that you're running the latest version of the WipperSnapper firmware.

The device tile on the left indicates the version number of the firmware running on the connected board.

Next, make sure the sensor is plugged into your board and click Start I2C Scan.

You should see the AHT20's default I2C address of 0x38 pop-up in the I2C scan list.

I don't see the sensor's I2C address listed!

First, double-check the connection and/or wiring between the sensor and the board.

Then, reset the board and let it re-connect to Adafruit IO WipperSnapper.

With the sensor detected in an I2C scan, we're ready to add the sensor to your board.

Click + New Component to bring up the component picker.

Select the AHT20 from the component picker.

On this screen, you can configure the AHT20's settings. You may want to rename the sensors or change their return period. When you've configured your AHT20 sensor, click Create Component.

Your device interface should now show the sensor components you created. After the interval you configured elapses, WipperSnapper will automatically read values from the sensor and send them to Adafruit IO.

This guide was first published on Jun 05, 2020. It was last updated on 2022-03-23 15:24:53 -0400.

This page (WipperSnapper) was last updated on May 13, 2022.

Text editor powered by tinymce.