Thomas

@suskitech: This board looks interesting - thanks for letting us (and others) having a peek under the LED display! I guess that the 321 on the silkscreen near the SOT23-5...

@VK6TT saw to it that I got a new ZB2L3 in my mailbox. The first thing I did was to remove the LED display:  My specimen has a Nuvoton...

The LED driver chip on the new board is an [ET6226M](http://archive.espec.ws/files/ET6226.pdf) The chip is pin compatible with the TM1650 Here is a Google translation of the functional register description: ET6226...

@suskitech thanks for the pin description! I inserted some Markdown formatting, I hope you don't mind :-). The good news is that PD1/SWIM can be used as a communications interface...

The best price for an STM8Sx03F3P6 I've seen in a while is [$0.32@10pcs](https://www.aliexpress.com/item/10-pcs-lot-STM8S003F3P6-TSSOP-20-8S003F3P6-TSSOP20-STM8S003-TSSOP-new/32968005643.html). I guess it's best to order some now, they won't go bad :-) Sometimes STM8S103F3P6 breakout boards...

I made a start by flashing the SWIMCOM binary to a ZB2L3 board - I'm trying to use M.Mahlows VOC-I2C demo in the examples folder. So far, I still get...

@VK6TT Richard, thanks for the code! In the far past I wrote several bit-banged I2C interfaces that were used at industrial scale, and I also learned quickly that timing is...

@ildar thanks for reviving the discussion! The video is indeed very useful. Maybe I'll find some time working on this during the winter break - if you'd be willing to...

@ildar I didn't quite manage to get to it during the winter break, sorry

@ddodge40 I'm still waiting for someone to write some specs: * what do you expect the board to do so that a replacement software can be designed * be inventive,...