In final form, a Bluetooth module and Arduino Pro Micro are stuffed inside the stereo along with a DPDT relay to switch the I2C bus. An external button is used to trigger the Arduino to switch to ...

I cut the trace leading to the Bluetooth interface module and soldered a wire so the switch now pulls an Arduino pin to ground when pressed. A few pieces of internal plastic reinforcements for ...

Patrick Thomas Mitchell has been once again been creating awesome add-ons for your Arduino ... can use this module to communicate between rooms within the house! The HC-06 Bluetooth receiver ...

Once paired, these modules relay serial information from your smart device to the dev board and vice versa. Just reverse the receive (Rx) and transmit (Tx) lines between your Arduino and Bluetooth ...