We purchased a Nimble pet monitor. It basically monitors temperature and sends you alerts when the temperature is out of range, you are on battery, etc. It works through a cellular network, not wifi, and we haven't been anywhere it doesn't work. You pay a monthly/annual fee for the cellular service, but it isn't outrageous. At least we can make sure that the air conditioning is still working in the coach. We don't need a camera to monitor the dogs, so temperature only is fine for us.