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Enfora Enabler II-G Assisted GPS
Modem Integration Guide
of bytes downloaded per connection will be less as compared to the LTO file used in the Enhanced
Autonomous mode.
The following parameters will need to be programmed in order to provide data connection parameters
to the network and location assistance server:
AT+CGDCONT=1,"IP","APN" - Set GPRS connection with Network. APN is provided
by the network operator
AT%CGPCO=1,"username,password",0 - Set GPRS username and password, if any
AT$AREG=2 - Automatic GPRS registration
AT$GPSDST=”1.2.3.4”,”5.6.7.8”,1265 - Set the IP addresses and port number of the SUPL
interface
AT$GPSSRC=1270 - Sets the Source Port number for the SUPL interface
AT$LTOFREQ=4 - Defines how often the LTO files are downloaded from
the SUPL interface (4 hours with this setting)
Set
one of the following depending on desired operation:
AT$GOPMD=2,1,0 - Sets the GPS operating mode to mobile-based, the fix mode to one-
time fix, and the periodic report interval to 0 (not used in one-time fix
mode)
AT$GOPMD=2,2,0 - Sets the GPS operating mode to mobile-based, the fix mode to
native, and the periodic report interval to 0 (not used in native fix
mode)
AT$GOPMD=2,3,x - Sets the GPS operating mode to mobile-based, the fix mode to
timed interval, and the periodic report interval x to a value between 2
and 7200.
Set
one of the following depending on desired operation:
AT$GPSLCL=0,<msgType> - Turns all local serial port reporting off, <msgType> is
not used
AT$GPSLCL=1,<msgType> - Directs the GPS data of <msgType> over the main
serial port
AT$GPSLCL=2,<msgType> - Directs the GPS data of <msgType> over a serial DUN
connection (PPP) as UDP/IP packets, with UDP-API
header
AT$GPSLCL=5,<msgType> - Directs the GPS data of <msgType> over the second
serial port
AT&W - Writes the settings to non-volatile memory
Upon setting the configuration above, the modem will operate in mobile-based mode and will stream
the selected data over the desired serial interface.
8.3. Enhanced Autonomous
The enhanced autonomous mode provides assisted GPS data that is processed on the module to
provide more robust GPS operation. The enhanced autonomous mode will utilize a Long-Term Orbit
(LTO) file. In order for the enhanced autonomous mode to function correctly, the LTO file must be
downloaded to the module. In Enhanced Autonomous mode, the module will download ephemeris
MLG0208PB001 43 Version1.01 – 10/3/2006