You have entered the Beta Zone! This guide along with WipperSnapper Firmware's Offline Mode is a work in progress.
For more info, please scroll down to the bottom of this page.
Looking to build an electronics project that logs data to a MicroSD card?
In this guide, we'll build a simple datalogger that can log temperature, barometric pressure, and humidity to a microSD card, without programming! You'll install WipperSnapper's offline mode firmware on an Adafruit Feather RP2040 Adalogger, format the microSD card to be used for storage, and add a configuration file to use the Feather RP2040 with the BME280 Humidity + Barometric Pressure + Temperature Sensor Breakout.
What's "WipperSnapper Offline Mode"?
Adafruit WipperSnapper firmware's offline mode enables you to build and configure a data logger project without writing any code. Just install the WipperSnapper offline mode firmware on your board, add a configuration file to the board's filesystem, and reboot the board. When the board reboots, the board automatically configures its sensors and immediately begins logging data to a microSD card and through a USB Serial connection.


Adafruit WipperSnapper's offline mode is currently in active development. While the firmware is ready for you to use, configuring the device isn't as magical and adafruit-y as we'd like...yet!
Our developers are building out a web-based workflow that will be accessible from Adafruit.IO to allow you to visually configure your device's sensors and export the resulting configuration. This will be similar to how you add sensors and configure a device from Adafruit IO.
We encourage you to try out the WipperSnapper offline firmware with the understanding that it is not final release software, is still in development, and will get easier to use over the coming months.
You should be comfortable creating and editing a JSON text file.
We are releasing this guide before the web-based workflow to get feedback from the community. You may want to wait a few months for us to build out the web-based workflow for the offline mode.
If you encounter any bugs, glitches, or difficulties while following this guide, please file an issue on the WipperSnapper support forum.
Page last edited March 04, 2025
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