I know what I want and I know how I want it to work.
I have seen on here and other sites circuits and projects that almost do what I want, but the they are too complex.
Basically I want a keyless vehicle ignition using bluetooth.
What it needs to do:
When my mobile moves into range it will turn on (and stay on).
When my mobile moves out of range it will turn off.
It needs to run from vehicle power or recharge itself from it.
It specifically does not require an app on the subject device.
I normally keep my bluetooth turned off, so it would actually be when it is turned on or off.