The Remote Monitoring System Based On GSM-SMS

Along with rapid popularization and furious competition of GSM network, research and application of new technology and new operation have been mentioned to a quite important position. SMS as a basic service of GSM network has been attented by more and more system operator and developer, and kinds of applications based on this service have been rapid developed. This paper present a remote monitoring system based on GSM-SMS, this paper first presents the system design as a whole, then presents the hardware and software design of system, at last presents some discussions and investigation in applying field. In this system GSM network is a medium for transmitting the remote signal, it presents detailed explanation of GSM network's system structure and emphasizes the communication principle that is important for the task. The mode of transmitting data is most SMS. PDU mode is used during transmitting SMS. It presents encording and decoding of SMS PDU mode. Transmitting and receiving SMS is realized by using AT command. It presents the familiar AT command and using method. It presents TC35 and microchip MSP430F149 MCU and peripheral circuit during design of system hardware. Hardware of system includes two parts: the monitoring center and the remote monitoring station. It consists of a computer and a TC35 communication module of GSM in the monitoring center. Computer and TC35 are joined by RS232. It includes a TC35 communication module of GSM, a MSP430F149 MCU, a display part and a gathering data part. It includes the monitoring center software and the remote monitoring station software in design of system software. The monitoring center software is designed with Visual Basic 6.0. It presents method of serial communication control MSComm, finishes the interface design and the function of receiving and transmitting and saving data. The remote monitoring station software is designed with C430 integration developing environment that IAR designed for MSP430 single chip and C-language debugger. It includes single chip initialization and main program and interrupt of gathering signal and SMS receiving and transmitting program through the serial port. In the end of the paper, it presents a remote temperature monitoring system based on GSM, using the designed system of remote monitoring system based on GSM-SMS and technique of measuring temperature. And then presents any discussions and investigation in applying field.