Re: IR Unit with Core S3

Ran into the exact same issue this evening. Seems like I spend more time debugging this system than doing anything useful with it right now. Thanks!

_ ()/ | | _____ __
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[INFO] Syncing resources...
[INFO] Network connected!
Traceback (most recent call last):
File "main.py", line 41, in <module>
File "main.py", line 25, in setup
File "unit/ir.py", line 24, in rx_cb
File "driver/ir/nec.py", line 116, in init
File "driver/ir/nec.py", line 67, in init
File "driver/ir/receiver.py", line 47, in init
ValueError: invalid Timer number

MicroPython v1.25.0-dirty on 2026-02-08; M5STACK AtomS3 with ESP32-S3-FN8
Type "help()" for more information.

For anyone else who has a StamPLC and a StamPLC AC Relay and is having issues using the UIFLOW2 AC Relay Blockly module and getting errors. The below screenshot shows how to use the I2C module to get it working. I used the https://www.diodes.com/datasheet/download/PI4IOE5V6408.pdf datasheet to work out which registers need to be set up to get this working. Keep in mind the LED's work on an opposite logic level to the relay.

After Some Tinkering I have a working example for anyone else who needs it.

I did try to share this on the project zone but like most things on here it throws errors instead of just working...

@lombric I have also discovered this issue today, added the StamPLC AC module into my UiFloww V2.4.3 environment and it crashes the controller. I had to force reboot it and reflash it with M5 Burner to recover it. VERY frustrating as this is a hardware software combination all built by M5 Stack. I have no idea how to resolve this as your post is from Feb 2026 and there are zero responses...