09-05-2014, 11:08 AM
SMS based home appliances control system
SMS based home appliances .doc (Size: 37.5 KB / Downloads: 8)
Abstract
Aim of this project is to develop an embedded system to control the electrical appliances connected to it. Commands will be sent to the system as an SMS using GSM technology.
We are going to develop the whole system based on 8051 family micro controller which is the heart of the project. In this project all the devices that are being controlled are run by using 230V AC current where as the micro controller we are using is run by 5V DC current. So to control these devices we connect them through Triacs. Which are in turn driven by opt couplers. We are using the GSM modem interfaced to the micro controller for communication. Using the AT commands of the GSM technology we can interface the modem to the micro controller. What ever the (SMS) message sent to the GSM modem will be sent to the microcontroller through serial communication (UART). The
program in the micro controller will be written in such a way to receive the message through serial communication pins and store it in controller’s RAM and then compare the received commands with the preprogrammed ones and take the corresponding action. By this we can turn on the devices or turn off the devices according to our wish.