Countdown

Pick a duration up to 3 hours and watch it count down. Big mm:ss digits in the middle, a horizontal progress bar drains from green to red as time runs out. Beeps at zero.

Controls

• BOOT — start / pause
• PWR — adjust duration in 1-minute steps
• long-press BOOT — reconfigure duration / end-beep

setup.txt keys (all optional)

• COUNTDOWN_MINUTES — initial duration in minutes (1–180)
• COUNTDOWN_BEEP — 1 for end-beep, 0 for silent

setup.txt only seeds the first boot; in-app long-press BOOT to change later.

Editing setup.txt

The device reads /setup/setup.txt from the SD card on boot. Download a working sample — covers every app — and edit the keys you need.

Don't want to eject the card? Use the USB Stick app (mounts the SD card as a USB drive over USB-C) or the Filehub app (edit over WiFi).