ws2812.write only emits the reset signal on ESP32-C3 but not the data

[docbacardi]

Expected behavior

The ws2812.write function should emit the reset signal and the data.

Actual behavior

On the ESP32-C3 only the reset signal is generated. The data is not generated.

I could narrow down the problem to the function ws2812_fill_memory_encoded which writes new items to the RMT memory, but nothing appears on the outside. To be honest I have no idea what is going wrong, but I have a workaround. The new SDK offers a translator callback to generate new RMT items on the fly from input data. I have a patch for this.

Test code

This should burn a hole in your retina using the onboard RGB LED of the ESP32-C3-DevKitM-1:

ws2812.write({pin = 8, data = string.char(255,0,0)})

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Hardware

ESP32-C3