Data Communication; Gprmc Nmea Sentence; Table 13. Nmea $Gprmc Sentence Decoded - quanergy M8 User Manual

Data Communication

Different types of NMEA messages (called sentences) are sent from a talker such as a GPS
receiver to one or more listeners, including M8 sensors. Configure the GPS receiver to send
the PPS signal first, followed only by the $GPRMC and/or $GPZDA NMEA sentences. (Filter
out sentences that are not used). The M8 sensor accepts the GPS unit's NMEA sentence in
the $GPRMC and $GPZDA forms. If the GPS sends both messages, the sensor uses
whichever it receives first.

$GPRMC NMEA Sentence

The $GPRMC NMEA sentence states position, velocity, and time according to this formula,
which is explained in Table 13:
Formula:
$GPRMC,hhmmss.ss,S,xxxx.xxx,N,xxxx.xxx,E,vvv.vv,aaa.a,ddmmyy,vvv.vv,W*CC
Example:
$GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
Data Field
$GPRMC
$
GP
RMC
hh
mm
ss.ss
S
xxxx.xxx,N
xxxx.xxx,E
vvv.v
aaa.a
dd
mm
yyyy
vvv.v,W
*CC
5 Because the NMEA 0183 standard uses a simple ASCII (text) serial communications protocol to encode its data, the data is readable
when it is opened in a text editor.
5

Table 13. NMEA $GPRMC Sentence Decoded

Meaning
Message ID
Indicates start of the NMEA messages
GP indicates that a GPS is sending the data
Recommended minimum data (GPS/transit position, velocity, and time)
hours (00-23)
minutes (00-59)
decimal seconds (00.99-60.99)
status A=active or V=void
latitude (disregarded)
longitude (disregarded)
speed (disregarded)
course (disregarded)
day (01-31)
month (01-12)
year (1970-2069)
magnetic variation (disregarded)
checksum (00-FF)
M8 Sensor User Guide, QPN 96-00001 Rev K Page 69