here, We'll demonstrate how to start a straightforward home automation project that will enable you to use Bluetooth on your smartphone to operate household equipment.
The microcontroller in this lesson will be the Arduino UNO development board, but you may easily replace it with a microcontroller of your preference ( Note that if you use a controller outside the Arduino family, the code will have to be appropriately modified).
We'll use the HC-05 Bluetooth module to add Bluetooth capabilities. As a result, we will be able to exchange messages with other Bluetooth devices, including your smartphone, and with the Arduino UNO development board.
We will also need a Relay module because we are controlling AC appliances, which operate at a higher voltage and cannot be directly controlled by the Arduino UNO development board (or any other embedded device). Make sure that the appliance's maximum voltage and current ratings are well within the relay module's rated voltage and current range.
Components Required :
Connect the TX pin of the HC-05 module to PIN 10 on the Arduino UNO
Connect the RX pin of the HC-05 module to PIN 11 on the Arduino UNO
Connect one of the relays signal pins to PIN 5 and the other relays signal pin to PIN 6 on the Arduino Uno
Connect the Vcc pins of the BlueTooth module and relays to the Vcc of the Arduino UNO
Connect the GND pins of the BlueTooth module and relays to the GN pin of the Arduino UNO
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