I was having the exact same problem after migrating my Zigbee network to the Sonoff 3.0 Plus (Skyconnect is using the extension cable it came with and the Sonoff was directly plugged into the Pi but it’s a 3B+ so it couldn’t have been intereference from USB 3.0).
Each time I rebooted it would come up with the “Add Sonoff Integration”, even after a (somewhat?) successful migration. Clicking Add I would get “Failed to probe the USB device”. I tried using the Skyconect’s extension cable, exact same thing. Thankfully I had an ancient unpowered USB hub laying around so I figured “what do I have to lose”? It actually asked me if I wanted to migrate this time (there was nothing anymore left to migrate) but I proceeded. Automatic migration failed (as it did the first time around), but doing an Advanced migration (of what? the Sonoff was already in charge of the Zigbee network and I’ve long since flashed Thread onto the Skyconnect, it was just the “Add Sonoff integration” that kept popping up every time even though it was working fine).
Long story short, it apparently successfully migrated itself using the unpowered usb hub and the message seems to have stopped appearing now (even after removing it from the usb hub and plugging it back in directly, no msg anymore even after a reboot).
I don’t have an actual “Sonoff” integration like I do for the Skyconnect (or ZHA-1), but it is (still) listed. Is this normal?
This is what it looks like.
I’ve been told my 3B+ is underpowered and that HA needs at least 2 gigs of ram to run properly (and I’m getting a ton of hci0: bluetooth errors - hopefully the 5 fixes this).
But yeah, I want to make sure everything is (now) fine with my HA installation and I can just use an upgrade. I keep getting the feeling something went wonky during the migration process (it didn’t rename the Skyconnect to Snoff for one, but that I can live with if everything else is as it should be).
Any input from the Sonoff owners? Do you have an actual Sonoff integration or is it just listed as a device under zha?