Design Of Remote Temperature Control Systerm Based On GSM

This paper introduces the hardware composition and software design process and the working principle of the communication module and the terminal module of the design—Design of remote temperature control system based on GSM.In this design, the core control chip AT89S52microcontroller connects with module WISM02C through a level conversion module RS232.When receiving the AT control messages which are sended in PDU modem by the user,The AT89S52MCU will command the PT100temperature samplificility system to samplify from the house for its temperature.After the samplified go through expending circute AD620and LM358,the signal can be send to AD modulus to make it to digital information and can be send to the MCU.The MCU uses fuzzy control ideas to do fuzzy control with the signal and get final control signal in the end.The finally got signal gose through DA to be a0-5V control signal,then it can do actions on power regulation chip to control it open and close.Automatic temperature compensation come true.At the end, the temperature control system will set send feedback message to the user,and buzzer at the same timeOn the other hand,the design added close interactive on MCU.Users can control the department systerm with keyboards and see the temperature on LED screen.Both the use of faraway control and fuzzle control make it possible to make our life convinent and quickly.