Yeah, I have 3 Pi Zero’s scattered around running monitor also. Though I’m still beta’ing them rather than using them in anger atm.
I also have a Wemos D1 running Tasmota in the car, which, when it connects to MQTT (usually on car start, or on returning home), triggers various stuff.
In case you are interested (and with apologies to the OP for the thread hijack), I was planning on doing an AppDaemon app which merges the monitor results with the Unifi presence (and maybe door sensors and zigbee presence detectors) to (hopefully) give an even more accurate and timely result of presence/absence.
That said, I’ve been too busy to make any progress on it recently, but someone else has shown an interest in doing it - Advice on app design please