GPS Receiver Overview

GPS data can be read from an internal serial port (/dev/ttyS3).

GPS Port Information:

Port = /dev/ttyS3
Default baudrate = 9600, 8, N, 1
Default NMEA = GGA / GSA / GSV / RMC / VTG  every second

Visual Indicator:

LED indicator to indicate the current position status:
ON = no valid fix position
BLINK = valid fix position

For MultiConnect OCG-D, the GPS LED indicator exists on the GPS module itself (inside the unit).
For MultiConnect OCG-E, the GPS LED is only on the developer board, not on the MT100EOCG gateway board.

Example of NMEA messages:
$GPVTG,285.9,T,,M,000.0,N,000.0,K,A*0B
$GPGGA,200453.086,4505.9708,N,09311.7553,W,1,11,0.9,266.2,M,-29.0,M,,0000*63
$GPGSA,A,3,21,18,24,15,03,26,27,14,19,22,09,,1.7,0.9,1.5*37
$GPGSV,3,1,12,18,79,006,26,21,65,162,29,26,58,210,31,22,51,286,33*73
$GPRMC,200453.086,A,4505.9708,N,09311.7553,W,000.0,285.9,220210,,,A*7B
$GPVTG,285.9,T,,M,000.0,N,000.0,K,A*0B
...
GPS NMEA Protocol Overview:

NMEA Message Protocol

GPS Binary Protocol Overview:

Binary Message Protocol