Design Of Wireless Data Transmission System Based On ARM And GPRS

Wireless data transmission system is widely used in security-monitoring, equipment -monitoring, environment- monitoring, remote meter- reading and so on. Compared with cable transmission system, the construction and maintenance of wireless system is lower-cost , the distance of communication is farther and the expansion of terminal is easier.Meanwhile the system is real-time and the reliability of the network is high. So the research of wireless data transmission system has very important practical significance.The current domestic and international status quo of wireless data transmission system were researched in this paper. Meanwhile, the ARM microprocessor embedded real-time operating system and GPRS technologies were studied. So we proposed a wireless data transmission system based on ARM and GPRS. It fully utilized the advantages of GPRS network,such as high coverage, always on-line.It also used the ARM microprocessor with low power consumption, practical advantages. So the system was widely used in the field of remote data transmission.In the design of the hardware circuit, the ARM7 microprocessor LPC2210 was selected as the main controller and the Nor Flash and Nand Flash were expanded to store programs and data respectively. The GPRS module M23 embedded TCP/IP protocol stack was used as data-sending module.The microprocessor operated the TCP/IP protocol to connect to Internet through the AT command. This design reduced the difficulty of programming and shortened the development cycle.In the design of software, theμC/OS-II real-time operating system and ZLG/FS file system were transplanted to LPC2210.When the system starts to work, it initialize the hardware and operating system firstly, and then starts the collection process and saves the data to the Nand Flash. The system detects the connection of the GPRS network before sending date. If the network is smooth, the system will load the data from the Nand Flash and send it to the remote control computer through the GPRS module M23.This system is stable, reliable and low-cost. Tests show that the wireless data transmission can meet the actual need.