
Chapter 12 – Postion Determination (GPS) Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
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Position Determination Operating Mode +WPDOM
Description:
This command sets the desired position determination session operating mode. The mode specifies how the
next PD session position data is to be derived and calculated. An attempt to change the session mode while
a PD session is in progress will result in an error.
Values:
<mode>
0
Standalone only; MS uses internal GPS functions.
1
Network (PDE-based) only; MS obtains all position determination data from the PDE.
2
Speed optimal (minimize time-to-fix, MS-based first, PDE-based later if failed).
3
Accuracy optimal (PDE preferred, MS in case of failure) .
4
Data optimal– minimize data exchanged between MS and PDE.
5
MS-based only; MS performs all position determination functions.
Syntax:
Command syntax:
AT+WPDOM=<mode>
Command
Possible responses
AT+WPDOM?
Note: Request current setting mode
+WPDOM: 5
OK
Note: Current mode displayed.
AT+WPDOM=1
Note: Use PDE provided data.
OK
Note: Command valid.
AT+WPDOM=?
Note: Display valid command parameter range.
+WPDOM: (0-5)
OK
Position Determination Data Download +WPDDD
Description:
This command specifies configuration parameters that are used in a position determination data download
session. The default is zero for both parameters if the +WPDDD command is not used. The appropriate
parameters must be set prior to starting a PD data download session.
Values:
<type>
0
Single-shot download of ephemeris/almanac data
1
Periodically download ephemeris/almanac data. <duration> specifies time between downloads.
<duration>
Number of minutes between ephemeris/almanac data downloads when <type> is set to 1. Range of this
parameter is 0 to 255 minutes. The download duration parameter is currently ignored.
Note:
The GPS almanac data is valid for 3 to 4 days and GPS ephemeris data is valid for 30 to 120 minutes.
Syntax :
Command syntax:
AT+WPDDD=<type>,<duration>
Command
Possible responses
AT+WPDDD=?
Note: Display valid parameter ranges.
+WPDDD: (0-1),(0-255)
OK
AT+WPDDD?
Note: Display current settings
+WPDDD: 0,0
OK
AT+WPDDD=0,60
Note: Request single-shot data download
OK
Note: Duration value currently ignored.
AT+WPDDD=1,30
Note: Request continuous data download
OK
Note: Duration value currently ignored.