nmea 0183 gps

Detailed explanation of GPS NMEA-0183 Protocol NMEA AssociationThe purpose of this discussion is to establish a unified btcm (maritime radio technology commission) standard in different GPS (GPS) navigation devices by the Nation

NMEA is the abbreviation of National Marine Electronics Association (National Maritime Electronics Association. The Association is a private institution dedicated to research on marine electronic devices and has developed NMEA standards for communication interfaces and protocols between GPS (GPS) electronic devices.

NMEA is a set of standard information that defines the output of the receiver. There are several different formats, each of which is an independent ASCII format that separates data streams. The data stream length ranges from 30 to characters, the output is usually selected at intervals per second. The most commonly used format is "GGA". It contains the positioning time, latitude, longitude, height, number of satellites used for positioning, and other

[B] GGA, GlL, GSA, GSV, RMC, and Vtg interpretation of GPS 0183 Protocol [/B] [/size] [u] GGA, GlL, GSA, GSV, RMC and Vtg: [/u] [/color]$ GpggaExample: $ gpgga, 092204.999, 4250.5589, S, 14718.5084, E, 24.4, 19.7, 0000, M, * 1fField 0: $ gpgga, statement ID, indicating that the statement is Global Positioning System Fix Data (GGA) GPS location informationField 1:

Main.c#include #includestring.h>#include#includeintMain () {Char* str ="123,456,789,0123456,123456,0,09,10"; Charsub[3]; intCount =0, index =0; for(index =0; Index index) { if(Str[index] = =',') ++count; if(Count = =6) Break; } strncpy (Sub,str[index+1],2); sub[2] =' /'; printf (sub); //123,456,789 intn =atoi (sub); printf ("string =%s integer =%d\n", Sub, n);}EndC-Language string lookup (NMEA protocol parsing for