Demo
The speaker in action (2026-09-27): the Żabka Triki BLE token works as a wireless knob, and the NeoPixel ring shows each stage of the voice loop.
The device


From the back, top to bottom: the rotary encoder and the 7-LED NeoPixel ring on the speaker enclosure, the WM8960 audio HAT, the Pi Zero 2 W and the UPS-Lite battery board. See Hardware for pins and quirks, and Architecture for what each ring animation means.