The project aims in designing a system which makes operating of electrical appliances in home through Android mobile phone using IOT. The controlling of electrical appliances is done wirelessly through Android smart phone using the Wi-Fi feature present in it. Here in this project the Android smart phone is used as a remote control for operating the electrical appliances.   Wi-Fi (Short for Wireless Fidelity) is a wireless technology that uses radio frequency to transmit data through the air. Wi-Fi has initial speeds of 1mbps to 2mbps. Wi-Fi transmits data in the frequency band of 2.4 GHz. It implements the concept of frequency division multiplexing technology. Range of Wi-Fi technology is 40-300 feet.   The controlling device of the whole system is a Microcontroller. Wi-Fi module and Relay, Transistor are interfaced to the Microcontroller. The data received by the Wi-Fi module from Android smart phone is fed as input to the controller. The controller acts accordingly on the Relay, transistor to switch connected electrical appliances. In achieving the task the controller is loaded with a program written using Embedded ‘C’ language.    

The main objectives of the project are:  

1. Controlling of AC devices wirelessly through mobile phone.
2. Usage of Android touch screen smart phone to performing the task.

    The major building blocks of the project are:  

1. Regulated Power Supply.
2. Microcontroller.
3. Wi-Fi module
4. Relay with driver.
5. Crystal oscillator.
6. Reset.
7. LED indicators.

      Software’s used:    

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

  Regulated Power Supply:

     

       

Block diagram:        

video: