General Type Of Nmea Messages; Nmeaver H51; Message Id Gga: Gnss Positioning Data - Sunsea AIoT SIMCom SIM66 Series User Manual

2.2

General Type of NMEA Messages

The message format described in this section is for the versions shown as below:
The version of Beidou related messages extended on the basis of NMEA 3.0 (nmeaVer in CFGNMEA
command is h30)
The version of Beidou related messages extended on the basis of standardNMEA4.1 ($GBGSA, nmeaVer
in CFGNMEA command is h51)
The version of Beidou related messages extended on the basis of standardNMEA4.1 ($BDGSA, nmeaVer
in CFGNMEA command is h52)
BD3 satellites are involved in NMEA4.1 to support BDS satellites with number of 1~37.With the increasing
of satellites, only output GGA, GSV, GSA and RMC messages by default to prevent data loss at the rate of
9600. When the amount of data at 9600 baud rate is allowed, the maximum number of satellites will be
output, but it is limited to the amount of output data at 9600 baud rate. Under the strong sky signal, there will
be a phenomenon of incomplete output of the number of satellites. If the user opens other sentences,
priority is given to ensuring the complete output of the message added by the user. The number of satellites
and satellite information in the GSV message will be reduced accordingly
The baud rate of 115200 is supported, which is able to output all satellite information, and the default output
messages include GGA, GSV, GSA and RMC after switching. If other messages are required, send the
command separately
2.3

NmeaVer h51

2.3.1 Message ID GGA: GNSS Positioning Data

Syntax:$GGA,time,Lat,N,Lon,E,FS,NoSV,HDOP,msl,M,Altref,M,DiffAge,DiffStation*cs
Example:$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33<CR><LF>
Parameter
--
time
Lat
N
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Format Description
Positioning system flag
GP GPS+SBAS+QZSS joint positioning(1)
STR
GB BDS system standalone positioning
GN Multiple system joint positioning
UTC time, in the format of hhmmss.ss
hh Hour
STR
mm
ss.ss
Latitude, in the format of ddmm.mmmmm
STR dd Degrees
mm.mmmmm
STR North or south latitude indicator
SIM66 Series_NMEA Message_User Guide_V1.01
Minutes
Seconds
Minutes
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