Multi-Tech Systems CDMA Wireless Modem manual Position Determination Session Type +WPDST

Chapter 13 – Position Determination (GPS) AT Commands

CHAPTER 13 - POSITION DETERMINATION

(GPS) AT COMMANDS

These AT commands are supported on gpsOne equipped CDMA modems. GpsOne is a wireless-assisted hybrid solution that utilizes both GPS and base-station trilateration to determine the mobile positions in more covered situations other than GPS alone.

The following includes several set-up commands (+WPDST, +WPDOM, +WPDDD, +WPDFR, +WPDPL), the start-session command (+WPDSS), the end-session command (+WPDES), and responses. Setup commands are not required in most cases (as defaults will be provided) before the start-session commands.

Note that these commands are preliminary. Changes may be made when carrier plans for location services are more readily available.

Position Determination Session Type +WPDST

Description:	This command sets and returns the PD session type.
Values:	<type>
	0: session to provide the last position info available
	1: session to provide single-shot fix
	2: tracking mode independent fixes – session to provide continuous independent
	position fixes
	3: tracking mode – session to provide continuous position fixes
	4: data download – session to download ephemeris/almanac data only to minimize
	delays to obtain future fixes
	Note that when a tracking mode is requested (continuous position fixes) and the TCP/IP
	transport layer is used, the position fixes will not be retrieved until the data call ends. Only
	the last 10 position fixes will be presented.
Syntax:	Command syntax: AT+WPDST=<type>
	Command	Possible Responses
	AT+WPDST?	+WPDST: 0
	Note: Request current setting type	OK
	AT+WPDST=0	OK
	Note: select the last position info available	+CME ERROR: tbd (PD session already active)
	AT+WPDST=9	+CME ERROR: tbd (invalid PD parameter)

Note that these 2 errors can happen on all +WPD requests below, and may not be listed.

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 87