In this illustration we will going to wire the HC-04,HC-05 or HC-06 module  using serial communication with our Arduino board and  4 channel relay, we will going to control the relay on the Android smart phone or tablet via Bluetooth to control the relay remotely. See the illustration below for wiring all the required components. as our output device we will just see the LED status from the relay module, anyway you can plug any device to the relay like lights, home appliances or any device as you want that can be switch on.


Required Components

  • Arduino Board
  • Bluetooth Serial Module Board
  • 4 Channel Relay Module Board
  • Solder Less Bread Board
  • Jumper Wires / DuPont Wires

Wiring Diagram


Arduino Sketch

Android App


Download the android application here | Zip

Bluetooth Home Automation with Arduino and Android


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