ABSTRACT
On-board GPS system uses a satellite global positioning system GPS, the global GSM mobile communication system, GIS three key technologies, communications and networks will integrate technology, the full realization of the monitoring, management, communications, search functions, can provide real-time vehicle navigation and emergency rescue spot inquiries, tracking appointments, super-limits, History intervals services。
In this paper the construction and characteristics of OEM board are introduced and data format and information construction of NMEA—0183 are analyzed．TC35 module to the application methods are introduced, and AT command set that is short of receiving this information made a presentation format．Based on the research of the serial communication between AT89C51 single chip microcomputer and OEM board according t0 the hardware characteristic，a method of reading the navigation message is put forward by single chip microcomputer，TC35 and put through navigation data sent to a monitoring station．
Keywords：GPS；receiver；single chip microcomputer；serial communication；OEM board
