The plan. There are some articles on implementation of the "Over the Air" updates based on combination of Arduino and HC-05. In this post I describe realization which needs only one soldered wire to ...
Interfacing HC-05 bluetooth with arduino. Connect the circuit as follows: Bluetooth Tx with Arduino UNO Rx (D0) Bluetooth Rx with Arduino UNO Tx (D1) Bluetooth VCC with Arduino UNO +5V Bluetooth GND ...
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