![]() For the communication pins we will need to attach the Transmitter pin (TX) to the Arduino's receiver pin (RX) (Green Wire) and the Transmitter pin to the Arduino's Receiver pin (Orange wire). ![]() As you can see we pull out both 5V and Ground from our Arduino all the way through to the Bluetooth Module (Red and Black wires). Let's start by setting up our bluetooth module (bottom left component in the figure). Those 2 wire ends are the ones that will be pluged in the relay as shown in the other picture
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