The Bluetooth module wants 3.3v logic levels so that is ... The software end of things consists of an Arduino sketch and an Android app. Check out all the controls on that screen.
Just reverse the receive (Rx) and transmit (Tx) lines between your Arduino and Bluetooth module, and provide the proper input voltage level. This method requires zero software pairing; your device and ...
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 ...
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