This page will introduce the usage of the GPS/GNSS capabilities on 4G module (EM06_E). This includes how to enable the GNSS functions and get the raw satellite data from the module, And how to display the Positional data graphically.
Install minicom and open /dev/ttyUSB2 port.
$ sudo apt-get install minicom $ sudo minicom -D /dev/ttyUSB2
Send the following commands via minicom to enable GNSS.
AT+QGPS=1 AT+QGPSGNMEA="GGA"
Obtain GPS data through /dev/ttyUSB1 port.
$ sudo minicom -D /dev/ttyUSB1
Welcome to minicom 2.8 OPTIONS: I18n Port /dev/ttyUSB1, 15:30:32 Press CTRL-A Z for help on special keys $GPVTG,,T,,M,,N,,K,N*2C $GPGSA,A,1,,,,,,,,,,,,,,,*1E $GPGGA,,,,,,0,,,,,,,,*66 $GPRMC,,V,,,,,,,,,,N*53 $GPVTG,,T,,M,,N,,K,N*2C
Before you begin, install gpsd and the client programs by running the following command.
$ sudo apt install gpsd gpsd-clients
Open the gpsd configuration file.
$ sudo vim /etc/default/gpsd
Make the necessary changes to specify the correct device node.
Devices gpsd should collect to at boot time. # They need to be read/writeable, either by user gpsd or the group dialout. + DEVICES="/dev/ttyUSB1" # Other options you want to pass to gpsd + GPSD_OPTIONS="" # Automatically hot add/remove USB GPS devices via gpsdctl + USBAUTO="true"
Restart the services.
$ sudo systemctl restart gpsd
Start the cgps client to observe data.
$ cgps
Start the gpsmon client to observe data.
$ gpsmon