Firmware for the Raspberry Pi Pico W that runs an automated, connected fishfeeder.
You can find the 3D printer files and assembly instructions here:
https://www.thingiverse.com/thing:5517562
The source code for the accompanying Android app can be found here:
https://github.com/erikjber/Fish-Feeder-App
The project has been covered in the December 2022 issue of MagPi, the official Raspberry Pi magazine.