I have been testing geofencing for the last ten days or so - just set a geofence at home with 100m radius and monitor the notifications (no programs in ISY yet). For the first week things were running pretty well - better than 95% of the time I was getting accurate notifications upon entering and leaving the area.
I am still getting those accurate results when entering and leaving the area. However, the last two nights I started getting large numbers (10-15) of false exit/enter events. The phone was inside the house, plugged into the charger on my bedside table. I don't seem to have the problem when the phone is in other parts of the house. I have a good strong wifi signal, and I live in an area without a high density of wifi (inSSIDer usually only shows one outside network >20dB below mine).
I do have two wifi access points which use the same SSID set to channels 1 and 11. I also have a Sonos network set to channel 6. Not sure if any of these can confuse the geofence.
Any ideas?