GSM SMS With Temperature Measuring System Design

The GSM module, is one model the same as photo communication module, it certainfunctions on a small circuit wafer, it may transmit the short news, telephone conversation andso on, although the modules are small, but it has had many handset’s functions, has it to beequal to that had handset’s hard core, it has the widespread application in many place, theGSM module is controled by AT. This project is about long-distance controls warm about theGSM module, its function mainly realizes through the software programming.DS18B20is a now new single-bus digital temperature sensor produced by DALLAS, theU.S., which combines temperature measurement and A/D conversion in a body, can directlyoutput digital content, transmission distance, it is easy to achieve multi-point temperature, thehardware circuit is simple. It is small, easy to use, powerful, widely used in warehousemanagement, industrial and agricultural production, meteorological observations, scientificresearch and daily life.This system mainly by GSM module, the STC89C51, the DSl8B20temperature sensorand so on constitutes. First monolithic confidential realizes the temperature measurementfunction, gathers periphery through monolithic integrated circuit’s on temperature sensor thetemperature. Next realizes the monolithic integrated circuit and the GSM modulecorrespondence, photo transmission note for SIM card, after the GSM module receiveinformation, collected the temperature then transmission it to mobile. When the temperatureexceeds the limit value, the microcontroller will automatically control the GSM module to thephone to send temperatures.