Wireless Monitoring System Based On Short Message Development

With the continuous development of communication technology, wireless communications, mobile communications have become the mainstream of the development of communications direction. Mobile Communications Short Message Service feature, by virtue of its convenience, reliability and so on the merits favored, whether business or support network optimization, has been great development in recent years. On the other hand, many industries need for equipment to monitor working conditions in order to guarantee production safety and order, control system is essential. There will certainly be monitoring the control of information transmission, the transmission control system in general are to carry the cable network, the cable network has many advantages, but it also has many drawbacks: such as investment, complex networks, poor scalability. Public wireless networks are due to the telecom operators to be responsible for building and maintenance, so these shortcomings can be overcome. SMS wireless monitoring system, through the Short Message Service to monitor the transmission of information, with very good practical value and economic benefits.In this paper, based on GSM, CDMA, PHS network Short Message Service (SMS) to monitor the messaging system (WSN) and the principles of design to achieve. System includes three types of wireless terminals (GSM, CMDA, PHS standard three), the wireless terminal by the wireless modules and control modules. Wireless module in charge of public access to wireless networks, through the AT command control unit with wireless modules linked to the same time, the external control unit software to provide a complete set of communication protocols, this agreement wireless terminals and monitoring equipment (peripherals) connected; Hardware to connect to a RS232 interface, adjustable rate, the default 9600bps. Users of the sender that they need to pass messages to the wireless terminals A, A terminal through SMS message to be sent to the wireless terminal B, B terminal and then transmit the information users of the system receiver. This will start a real-time and transparent information transmission channel.