Bluetooth activation in the car

[Leone58]

When I start the car, the bluetooth of the car is activated. is it possible with macro droid to activate the bluetooth of the mobile phone, realizing that they are in the car?

 

[Lupus52]

I have an NFC-tag in my phone-holder. This switches to carmode with BT = on. Alternately, if my phone recognizes WLAN of my dashcam it switches to carmode

 

[Dm114]

When I start the car, the bluetooth of the car is activated. is it possible with macro droid to activate the bluetooth of the mobile phone, realizing that they are in the car?

Other methods in addition to @Lupus52's:
1⁰) use activity recognition (which is not very accurate but sometimes gives good results) ;
2⁰) when leaving home (or any other place where my device is WiFi connected) and losing WiFi signal, I assume I'm entering my car and activate BT a short while after leaving. If BT doesn't connect after a while I deactivate it (my assumption was wrong ).