Software Interface; Gga-Global Positioning System Fixed Data - RoyalTek RET-3570LP User Manual

2. Software Interface

NMEA V3.0 Protocol
Its output signal level is TTL: 38400 bps (default), 8 bit data, 1 stop bit and no parity. It supports the
following NMEA-0183
Messages: GGA, GSA, GSV, RMC .
NMEA Output Messages: the Engine board outputs the following messages as shown in Table 1:
NMEA Record
GGA
GSA
GSV
RMC

GGA-Global Positioning System Fixed Data

Table 2 contains the values of the following example:
$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18
Name
Message ID
UTC Position
Latitude
N/S Indicator
Longitude
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
MSL Altitude
Units
Geoid Separation
Units
Age of Diff. Corr.
Diff. Ref. Station ID
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RET-3570LP User Manual
Table 1 NMEA-0183 Output Messages
Global positioning system fixed data
GNSS DOP and active satellites
GNSS satellites in view
Recommended minimum specific GNSS data
Table 2 GGA Data Format
Example Units
$GPGGA
161229.487
3723.2475
N
12158.3416
W
1
07
1.0
9.0 meters
M meters
meters
M meters
second Null fields when DGPS is not
0000
*18
14
Description
Description
GGA protocol header
hhmmss.sss
ddmm.mmmm
N=north or S=south
Dddmm.mmmm
E=east or W=west
See Table 2-1
Range 0 to 12
Horizontal Dilution of Precision
used
End of message termination