Building on this, I drive a Chevy Bolt EV, and for various privacy concerns, I do not use OnStar, and even went as far as to disable it completely. This limits the app to Bluetooth only (which is all I want), but the range is shorter than the key fob.
Would it be possible to use a pair of Mesh units as a serial bridge to enable long range Bluetooth? One mesh stays in the car and is paired to the car’s Bluetooth, and the other Mesh is with the phone. When the car app is opened, it connects to the car through the Mesh units and essentially has a long-range Bluetooth link. Even though the MyChevrolet app does the same this as the fob, the one thing the fob doesn’t offer is a confirmation that the command went through.