No WIFI reachable at my hangar BUT I built a DTMF (telephone touch tone) device (from a kit) that provides four (4) individual switchable outputs each one of which (in my configuration) drives high power 110 VAC relays to feed engine heater, cabin heater, hangar lights and one spare circuit. I have a "pay as you go" cell phone that is on all the time and "auto-answers" when called. The phone is connected to a charger and timer that charges the battery once a day. The phone's audio output drives the DTMF decoder which reports acknowledgement of the specific circuit activation/de-activation. Phone costs less than $10 a month and I can operate the system from any phone, anywhere. I have used this for many years and it is nice to drive to the airport at night to find the hangar lights on, engine toasty and cabin warmed up, or just a warm airplane in the daytime! I have even called from the plane after landing at night to turn on the hangar floodlight and internal lights. Eat your heart out, Rube Goldberg!!!