RemoteControlling and Monitoring Systemto Control Electric Circuitry through SMS usinga

Mobilephoneshavebecomeoneofthemost popular communication devices amongmostofthepeople aroundtheworld,andShortMessageService (SMS)is popular amongmobile phoneusersasacheapandconvenient methodofcommunicating. Therefore, SMS technology isa commonfeature withallmobile networkservice providers. Since theuseofSMS technology isacheap, convenient and flexible way ofconveying data,researchers aretrying to applythistechnology inmanydifferent areasthatwerenot provided byservice providers atpresent. Oneofsuchareas thattheSMStechnology couldbeusedasacosteffective and moreflexible waywill beremotemonitoring andcontrolling. Therefore, a systemhasbeendeveloped tocontrol and monitor electric circuitry through SMS using thePlCmicroR 16F877Amicrocontroller remotely. The microcontroller performs allthefunctions ofthesystem. Standard Attention Commandsareusedtocontrol theoperation onSMS inthe mobile phone. SMSisproduced using theconcept ofProtocol DataUnit. I INTRODUCTION