Data Sheet

GPS Module
L80 GPS Protocol Specification
L80_GPS_Protocol_Specification Confidential / Released 9 / 41
$
Each NMEA message starts with ‘$’
GPVTG
Message ID
COG(T)
Course over ground (true) in degree
T
Fixed field, true
COG(M)
Course over ground (magnetic), not being output
M
Fixed field, magnetic
Speed
Speed over ground in knots
N
Fixed field, knots
Speed
Speed over ground in km/h
k
Fixed field, km/h
Positioning mode
‘N’ = No fix
‘A’ = Autonomous GNSS fix
‘D’ = Differential GNSS fix
*
End character of data field
Checksum
Hexadecimal checksum
<CR><LF>
Each of message
2.3. GPGGA
GGA, global positioning system fix data, is the essential fix data which provides 3D location and accuracy
data
Example:
$GPGGA,015540.000,3150.68378,N,11711.93139,E,1,17,0.6,0051.6,M,0.0,M,,*58
Field
Description
$
Each NMEA message starts with ‘$’
GPGGA
Message ID
UTC time
Time in format ‘hhmmss.sss’
Quectel
Confidential