@kkossev thanks (reading my mind) 
Was just thinking about trying to read the Chinese instructions.
Received another 4 FP1 devices yesterday (6 total).
Paired them to 3 different hubs with zigbee channels 19, 20, and 21.
Only my channel 20 hub gave me some trouble pairing but I suspect it is because it is due to interference next to my computer and Sonos play speaker.
But putting the hub into zigbee pairing mode and then holding the FP! button for aprox 5 seconds until the light blinks rapidly 3-4 times and they all paired fine.
Selecting configure after pairing to make the device powerSource change from "dc" to "?" then wait and trigger an change. The powerSource should change back to "dc". This appears to confirm the device is correctly paired.
The bad news is if these are powered off for to long they fall off the network and do not automatically rejoin. 12 hours for sure not sure what the minimum time is (a few minutes appears to be fine).
If they fell off the network I had to put the hub in pairing mode and hold the FP1 button again for 5 seconds.
But overall they work great.
I now have a lot of extra old motion sensors I don't know what to do with.
Same problem the old Aqara motion and flood sensors had.
Hoped they had fixed that 
So would be best on a battery backup system.
