Wordclock PCB

Powered by USB C, can be hung on the wall using holes provided.

Contains an ESP32-C3 and 114 addressable WS2812B LEDs which can show any colour.

You can write your own firmware or simply download the precompiled binary and install it.

Source code available from https://github.com/t0mg/wordclock

Has a battery holder for a CR1632 backup battery which is not included.

Make sure to use a 5V 3A power supply, the clock requires 3A to operate correctly.

Programming

Download the latest firmware_nodo_merged.bin from https://github.com/t0mg/wordclock/releases/

To program your Wordclock please follow these steps.

1. Plug the USB C cable to your computer and open https://espressif.github.io/esptool-js/ in your web browser (Chrome recommended, see https://caniuse.com/web-serial)
2. Click Connect in esptool. Select the correct serial port (on Windows it should be labeled USB Jtag / serial debug).
3. The console should then read the information of the ESP and finish with "Changing baudrate to 921600" "Changed".
4. Select the firmware_nodo_merged.bin file from your filesystem, change the address field to "0" and press Program.

If this doesn't work you may not have the new bootloader installed, in which case try:

1. Remove the 4 back screws to access the PCB.
2. Plug the USB C cable to your computer and open https://espressif.github.io/esptool-js/ in your web browser (Chrome recommended, see https://caniuse.com/web-serial)
3. Locate the 2 small buttons located in the bottom left corner of the PCB labelled BOOT and RST
4. Hold down both, then release RST
5. While still holding BOOT:
6. Click Connect in esptool. Select the correct serial port (on Windows it should be labeled USB Jtag / serial debug).
7. The console should then read the information of the ESP and finish with "Changing baudrate to 921600" "Changed".
8. You can release the BOOT button
9. Select the firmware_nodo_merged.bin file from your filesystem, change the address field to "0" and press Program.