Buying an FM transmitter is one of the cheapest ways to add Bluetooth to your ... The Mpow offers a downloadable mobile app ...
On the positive side, it’s one of the cheapest ways to add a Bluetooth functionality to your car and it has a lot of features ...
As for the add-on hardware, he built his own circuit board around an ATmega168 microcontroller and Bluegiga WT32 Bluetooth module. To connect to the car’s data system he went with an RS485 ...