Wordclock — a German word clock (Wortuhr)
A word clock that spells the time out in German words: an 11×10 grid of letters on WS2812 LEDs, driven by one firmware that runs on an ESP32-S3, a Raspberry Pi Pico 2 W (RP2350), an AVR128DA48 — and on a PC, where a simulator draws the matrix in a window so the clock can be built and debugged without hardware.
The window above shows 16:20, which German says as zehn vor halb fünf — ten before half five, the kind of wording the word tables have to cover.
Reference
- Serial command reference — every command the clock answers, over the serial port and over the web console alike.
- Fonts — the bitmap font table format, and how to regenerate one.
- Roadmap — what is still open, and what settles each item.
- Comparison — the other published word clocks this one was measured against, and where it ended up ahead.
- Measured decisions — a pattern that spanned the whole tree, and the build that decided it.
Auf Deutsch
Eine Wortuhr, die die Zeit in deutschen Worten anzeigt: 11×10 Buchstaben, WS2812-LEDs, Konfiguration per Handy über WLAN, Zeit über NTP, automatische Helligkeit und Update over the air. Die Firmware läuft auf ESP32-S3, Raspberry Pi Pico 2 W und AVR128DA48 — und im Simulator auf dem PC, ganz ohne Hardware.
The code
The firmware, the three hardware backends, the simulator and the build instructions are on GitHub: AndreasBur/Wordclock.