It seems some are compatible and some not. link to list in progress although progress might have fizzled out there.
The problem seems to be the SW point outputs a charge that causes an issue for some PIRs so in essence the SW point never ‘sees’ enough of a change so doesn’t trigger even though the PIR is going on/off and chucking 240v+ down the line.
Some people have put another ‘relay’ in between to take the voltage out of the loop but kind of defeats the object of the small Shelly 1.
Has anyone in the UK got a ‘working’ PIR with a Shelly 1 triggering the SW point?