If the Arduino is left connected to the I2C lines instead, volume and other settings ... In final form, a Bluetooth module and Arduino Pro Micro are stuffed inside the stereo along with a DPDT ...

For many commercial broadcast radio has lost ... hardware off of the same set of rechargeable NiMH cells, and also provides considerably improved runtime for the Bluetooth receiver.

According to its manufacturer, this software-controlled radio can be used to "[hack ... can be blocked by turning the iPhone's Bluetooth off in the Settings app—toggling Bluetooth in the ...