Just as Ticker predicted, the "Nest" home surveillance/controls systems are problems.
Seems that if someone hacks into your WiFi, the Nest system is easy-peasy.
A Milwaukee couple said their smart home was hacked. Their camera began talking to them, and their thermostat reached upwards of 90 degrees.
The Westmoreland family installed a Nest camera, doorbell, and thermostat in their home in 2018. They had no problems until they heard a voice talking through a camera in their kitchen....
Those doorbell cameras--if hacked--are also roadmaps for burglars interested in the home across the street from yours. I'm sure your neighbors will be very grateful to you for installing this system!!