Hello,
I was running HA on a Pi3b and wanted to migrate to an SSD. After setting the Pi to enable boot from SSD my Sonoff Dongle (usb-extension present) is not recognized anymore.
I had a Pi4 available so I tried that, same problem, after enabling boot from SSD the stick does not show up.
Tried USB2 and USB3-ports, no stick to work with. And now the biggest Problem: even without the SSD plugged in, both Pi don’t see the Sonoff Dongle. I even tried a fresh installation.
Is there something set in the Pi that makes the Sonoff Dongle unavailable?
Any help is appreciated.
Welcome to the forum, glimburg 
Could be a power issue where the SSD is using up the power from the rpi not leaving enough for operating the sonoff dongle. You should try with a powered USB hub.
Thanks Tamsy,
i can try that but even without ssd being connected it doesn’t work.