chip microcomputerABSTRACTWith the improvement of people's living standard,income has alsobeen greatly improved,most families enter the well-off stage,peoplehave higher needs and requirements for life.Since the beginning of the21st century,electronic equipment,household appliances andcommunication equipment have entered the homes of most ordinarypeople,but with them come hidden dangers of safety.The propertymanagement of old and new communities is uneven.In some oldresidential buildings,doors and Windows are often broken into or evenstolen.Young workers often go on business trips or work overtime.Somepeople break into houses and steal because no one is in the house or thereis no monitoring equipment,resulting in the loss of important propertyand serious personal loss.Based on the above situation,we can know that the traditional securitymeasures,such as security doors,security Windows,has been unable tomeet the needs of modern security.The progress of science andtechnology and the innovation of products are all for the purpose ofchanging and improving our life quality and making our life safe andconvenient.In view of the above situation,this paper establishes a homeburglar alarm system based on GSM short message module controlled bysingle chip microcomputer.This design USES STC89C51 single-chipmicrocomputer system,SIM900A GSM short message sending moduleand human body induction module.GSM SMS module are presented in this paper,based on single chipmicrocomputer control family security alarm system is introduced,including the sensor selection,selection of single chip microcomputer,thecontrol signal acquisition and transmission principle of single chipmicrocomputer control principle,software control algorithm and programcode design,hardware circuit design and circuit diagram drawing,etc.,involved in the product has high cost performance,the structure is simple,to fit the advantages of fast speed,the full implementation of the homeguard against theft,the realization of the function of the remote
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