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The diagram below illustrates the main features of the GNSS function.
Retrieve GNSS data from satellites and send to a remote operation centre periodically or save in local storage.
Global positioning with multiple GNSS systems, including GPS, and optional for GLONASS, Galileo, or BeiDou.
Mandatory for varieties of LBS (Location-Based Service) applications, such as advertisements, emergency calls.
Easy integration with AVL (Automatic Vehicle Location) applications, for managing fleets of service vehicles.
Other value-added applications, such as asset tracking, electronic toll collection, intelligent transport systems.
8.3.1
GNSS
On the GNSS configuration page, you can configure those functions that are mentioned above.
The configuration steps include following items.
Activate GNSS feature in gateway and finish settings of cellular WAN.
Support NMEA 0183 (compatible to 3.0) protocol, and allow customized prefix and suffix.
Configurable GPS data logging on local microSD card storage for route record tracking.
Indicate remote host, time interval, TCP/UDP, and type of GPS data that would be sent.
GPS Message Type
This item shows all supported types of NMEA 0183 data format. NMEA 0183 data format was defined and maintained by
National Marine Electronics Association (NMEA). Select one or more types that you want to use for transmitting GPS data. In
most cases, this configuration depends on which data format your central server can recognise. Only select the type you
need, otherwise it will consume unnecessary network bandwidth. The table below shows more information for different
types of NMEA 0183 message.
Type
Description
GGA Fix Information $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
GLL
Lat/Lon Data
GSA
Overall Satellite
Data
GSV
Detailed
Satellite Data
334 of 359
© NetComm Wireless 2019
Figure 394 – GNSS
$GPGLL,4916.45,N,12311.12,W,225444,A,*1D
$GPGSA,A,3,04,05,,09,12,,,24,,,,,2.5,1.3,2.1*39
$GPGSV,2,1,08,01,40,083,46,02,17,308,41,12,07,344,39,14,22,228,45*75
Example
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