The first value is the longitude, with positive values representing east of Greenwich UK
and negative values representing west. The second value is latitude, with positive
values representing north of the equator and negative values representing south. The
last value is the altitude expressed in meters above sea level.
If the modem has not locked onto its position when the <time limit> parameter of the
^WPQOS
command has expired, it will report:
^POSEND: 12,65534
Where
12
is the reason (timeout in this example), and 65534 is the number of attempts
left.
To end your GPS session enter the command
AT^WPEND
.
For more information on the commands used in this section please see both the Huawei
AT command manual, and the Huawei Application guide. These documents are
available at
www.zoomtel.com/4575support
.
Using Assisted GPS
If you have not already installed your hardware, you should do that now. Please see
Chapter 2 - Installing your ZoomCell
modem if you need help.
Assisted GPS (A-GPS) requires you to have a SIM card installed and set up for your
network. If you are not already set up for your network please see
Setting up your
Modem for the Network
.
After you have registered your modem on the network, set the modem for A-GPS:
AT^WPDOM=5
You may use
AT^WPDOM=4
instead to minimize the amount of data used, or
AT^WPDOM=2
to minimize the amount of time to first fix.
Next you must decide if you want to receive the GPS reading once, (single positioning)
or if you want to track the unit (tracing). To set single positioning, set
AT^WPDST=0
. If
you want to track the unit, set
AT^WPDST=1
. If you are tracking the unit, you need to
set how often you track it with the
AT^WPDFR
command. The format of the command
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