Control Electrical Appliances from Android Smart Phone using Bluetooth : Project Construction

Connecting Bluetooth Module with Development Board

The Bluetooth module has seven interface pins of which two are NC (not connected) pins. The table below shows how you can interface with it our low cost AVR development board.

Bluetooth Module Dev Board
GND GND
RST PD2
TX PD0
RX PD1
NC
NC
+5V IN VCC

Connecting Output Indicator LEDs

For initial testing purpose we will use LEDs to indicate the state of four loads. Once the testing is successfully completed then you can replace the LEDs with relays or triacs that can actually control the AC mains loads like light bulbs or fans. The load control outputs are available on the pins PD7, PB0, PB1, PB2

8_led_board_connection
These are the only two module required to build this project. One more thing that you need is two bi-colour LEDs that will indicate the status of system. Please refer to the schematic for more details. After the connections are complete, download and burn the hex file for this project using USB AVR Programmer. Please refer to this video for the steps.

Schematic

bluetooth_home_appliance_control_schematic_thumb
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for more detail:Control Electrical Appliances from Android Smart Phone using Bluetooth : Project Construction


About The Author

Ibrar Ayyub

Ibrar Ayyub is an experienced technical writer with a Master's degree in computer science from BZU Multan University. He has written for various industries, mainly home automation, and engineering. He has a clear and simple writing style and is skilled in using infographics and diagrams. He is a great researcher and is able to present information in a well-organized and logical manner.

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