MicroPython Forum (Archive)

Hello there.

About a month ago, I came across an interesting little ESP32-C3 powered board on Twitter. One side is covered in a 5x5 grid of WS2812B LEDs, making for some fun opportunities for creative hacks.



The boards come pre-loaded with an Arduino sketch for the ESP32 core, but we've found that the MicroPython ESP32-C3 port runs nicely (barring some adjustments that were recently made to the RMT code that enables the LEDs to be addressed correctly).

I've written up a couple of blog posts:

• Bringing the bling with MicroPython (blog post, with background)
• Making a CheerDot with MicroPython

I've also got all of the MicroPython code and my notes on GitHub, if you're curious. I'm a relative newcomer in the MicroPython space, so I'm curious to learn from the rest of the community.

Thanks for reading

As far as the 1st LED being stuck green mentioned elsewhere, they are pushing the margins powering the array with 3.3v (separate regulator for the cpu) while commonly done for a single on board indicator, a full array generally is powered by 5V in order to get full color fidelity, blue and green LEDs may lose some brightness and may color shift a bit on a 3.3V powered part, a added level shifter is necessary to reliably drive 5V displays from a 3.3v port.

The World Semi WS3812B (5050) absolute max specs limit Vcc of +3.5~+5.3 , test conditions for electrical characteristic specs: VDD=4.5~5.5V

(I have their 0.41" LCD board)