Hackaday2025_badge - the MacGyver Hack

This repository documents what has been done with the Hackaday Europe 2025 badge during the event and how.

It is loosely based on the 2024 Supercon 8 Add-On Badge.

Features

• Extended firmware of the Bendy Add-on to enable remote control via I2C:
  • Firmware repository: hackaday2025_bsao_addon
  • MicroPython class: bendy.py
  • Change blinking modes using buttons on the badge.
• Using SoftI2C for the Etch sAo Sketch add-on.
• Reading accelerometer data from the Etch sAo Sketch add-on.
• Drawing QR codes on the display of the Etch sAo Sketch add-on.
• Changing displayed content when flipping the board (detected via accelerometer data).

Check commit messages for more details.

Notes

• The Etch sAo Sketch needs to be connected to port 6.
• The Bendy SAO should be connected to port 3 and flashed with firmware from the hackaday2025_bsao_addon repository.
• The Petal and Touch Wheel SAOs (if used) should be connected to I2C bus 0 (ports 1 and 2; order doesn't matter).