Rainbow Electronics GM862-GPS - Manual (Page 105)

GM862-GPS Software User Guide
1vv0300729 Rev. 5 - 05/07/07
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5.5 Checking GPS device functionality
After a proper power on the device is ready to receive AT commands on the MODEM serial port.
The GPS receiver also will be automatically powered on and it will start the scan of the available GPS
signals.
On the NMEA serial port (default 4800 bps, 8, n, 1) there must be presence of the NMEA sentences.
5.6 CONTROLLING GPS RECEIVER
The GM862-GPS module is provided by a set of AT commands that permits to configure and use it
through the MODEM serial port.
For the full list of available commands please refer to the GM862-GPS AT Commands Reference
Guide.
5.6.1 POWER CONTROL OF GPS RECEIVER
The GPS receiver is by default switched on at the first power On.
If is necessary to switch it off or On is possible to use the AT$GPSP command.
The GPS part is supplied by the VAUX1 signal provided by the GSM part. The GPS receiver is usable
if the GSM module is switched on (or at least in power saving).
This command also switch off the GPS antenna supply.
Syntax of the command :
AT$GPSP=<status>
Where <status> means :
0 GPS controller is powered down
1 GPS controller is powered up (default)
? Returns the range of values accepted
AT$GPSP? will return the current status.
Example 1 : (to switch off the GPS)
AT$GPSP=0<CR>
OK
Example 2 : (to know the status)
AT$GPSP?<CR>
The answer will be: