I figured out I also have problems with /usr/syno/sbin/synousbmodemd

Domoticz first opens the serial port and then synousbmodemd seems to claim it - I now manually kill the process every reboot but how do I disable it?

Thanks!

I think I narrowed down the issue to the serial port driver: the cdc-acm driver seems to hang on my Synology; on any other system the serial communications works fine, just on my NAS it stalls.

I'm trying to debug my custom MySensors gateway and a standard RFLink gateway, both of which connect via serial port to my Synology NAS running Domoticz. I read every now and then in topic on this forum that people log the traffic on the serial port: how is that enabled? I only found the standard ...

I'm having issues with the RFLink board as well - where do I enable serial logging and how can I see the serial communications?