User guide
16 RTK GPS Expansion Pack
To send AT commands directly to the modem, tap Menu >
Commands to view this screen:
The current port is displayed along with the current baud
rate. In this example, the GSM modem has not yet been
congured. Port: is “COM5.” When it is congured, Port:
will be “VCA1.”
Type commands in the command box and press Enter to
send commands directly to the modem. Responses are
displayed in the box above the command box. This may
be useful for diagnosing problems.