Going for it, and no to the pop up.
Must be a windows thing 
C4 on latest firmware, fully functional.
Including child t/h.
Going to attempt moving back to C8P.
Thad did not work, blue/pink heartbeat for 10 minutes, then off line.
I don’t know about this new one, but both of my FP1E sensors paired through Sylvania lights. With Zigbee 3.0 repeaters everywhere, they decided on old ZHA 1.2. 
@woodsy, did you manage to pair successfully the FP300 to your C9-Pro hub?
Are you still seeing these 'Unprocessed ZDO command cluster=0002' messages?
I did not get it tp fully pair with the C8P.
Moved to C4, works fine, child and all.
Tried the other one I bought, no C8P.
Partial on C4, no child device.
Been trying to clear out the radios in C4.
After changing the firmware to Zigbee, do i have to attach it to one of the hubs in the Aqara app?
You'll only need the Aqara Home app once to switch the FP300 firmware to the Zigbee protocol. After that, you can uninstall the app from your mobile device.
I assume you haven't followed this pairing procedure to connect the FP300 to your C8 hub. It has worked 100% for me and many others.
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Should I remove the existing device prior to attempting to re pair to C8P?
I have tried the voodoo, certainly going to try again.
No need to remove the device; just follow the instructions precisely without any modifications, (there is no mention of device removal in steps 1 through 5...)
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Seems like a great sensor. Been waiting for a battery powered mmWave sensor.
It’s not yet availed in Sweden but it seems like they will be in stock just before or after Christmas, 
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I got it to pair with the C8P!
Double voodoo, then just ignored the number and duration of button presses and just used the color and timing of the LED bulb on the device.
Somewhere in here I found that I could not count, or the button is not polite.
Or I am so arthritic that I cannot feel my thumb
Thank you for your continual advancement of this fine platform!
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Just paired mine to my C8 to test out and it seems good. Can anyone tell me if when set to mmWave only it detects cats/dogs?
Might try these depending on the answer.
I just got a new kitten and ZB sensors LOVE him.
Lights On, lights Off, lights On....... 
mmWave sensors are much more sensitive to micro movements of anything in their field of view versus a PIR sensor. PIR sensors rely on passive infrared movement across their field of view. This makes them ideal for detecting warm-bodied humans and animals. However, when that warm body sits relatively still, they will report no motion. mmWave sensors basically use radar to detect tiny changes in the reflections of the radar waves they send out. Thus, any moving object, a person, a spinning fan, a waving curtain, a plant moving when the HVAC vent blows, etc… will keep them triggered. Some mmWave sensors even claim to be able to detect the beating of a heart.
Thus, if your pet is within the field of view of the sensor, it will “see” the animal. You might be able to adjust the viewing angle of the sensor to try and prevent pet detection, but doing so may limit the effectiveness of the sensor’s ability to detect humans.
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Pairing went great, and operation appears to be as described. Thanks for the driver!
The absence delay timer setting has a minimum of 10 seconds. The documentation suggests that the minimum might be lower. It gives an example of the total time of 15 seconds, with only 5 seconds due to the driver setting. Is there any way to get the shutoff to be in the 5 seconds range?
-Tom
You can try experimenting by changing the minimum allowed value of absenceDelayTimer in the code from 10 seconds to 5 seconds :
Ten seconds is the minimum value allowed in the Zigbee2MQTT implementation. I’m not sure whether reducing it to 5 seconds would be stable, or if it might lead to frequent false “motion inactive” events.
