Design And Construction Of .A Home Control Switch Automation Using Gsm Communication

ABSTRACT

With advancement of technology things are becoming simpler and easier for us.

Automatic systems are being preferred over manual system. The purpose 0f this

project is to design and construct A GSM based home automation using GSM

Module. Using GSM networks, in-.'this project a home. power control system has

been. designed that will act as an embedded system which can monitor and control · . . .

appliances and other devices using built-in input and output peripherals.

The system has a delay of 30 seconds after the first SMS to initiate the next

command. This project is made up of four vital units. These units are as follows:

GSM module unit, peripheral interface control (PIC) unit, driver unit and a power

monitoring and control unit. The GSM module is a GSM transceiver which gives

the system access to the GSM service provider. The peripheral interface control

(PIC) is programmed to carry out-the OFF/ RESET operation according to the

GSM commands while the driver and control  :unit consist of capacitors, resistors,

diodes, regulators and electromagnetic relay is to ·effect power switching. The

architecture consists of mobile phone. and GSM modem. In the system design,

incoming SMS message is sent from the user phone to the GSM as a text

message via cellular network. The  GSM. module then sends the . commands in ·

text mode to the PIC microcontroller using an RS232 interface. The RS232

voltage levels are at ±12V whereas both the microcontroller output

operates at 0V to +5V. Since RS232 is not compatible with microcontroller,

MAX232 is utilized to enable the communication between both the GSM modem

and PIC microcontroller by converting RS232 _level signals to TTL level signal.

Outgoing message from the system: containing the home appliances status is delivered to the mobile phone through GSM modem.