Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 85 - CalAmp Proprietary & Confidential

11.1.4 SMS GPS Status Message

The GPS Status Message allows users to remotely poll the LMU for its current position via

SMS. The message is formatted as follows:

GPS:<Fix Status> <Satellite Count> <GPS OFF>

LAT:<latitude>

LON:<longitude>

HDG: <heading>

SPD: <speed km/h>, <speed mph>

MID:<mobile id> <mobile ID type>

• GPS:

o [<FixStatus> <Sat Count>]:

If these fields are present it indicates that the LMU has, or had a valid GPS

solution. The <Sat Count> field indicates how many GPS satellites are

currently in use by the LMU. The <FixStatus> field indicates the type of fix.

The Fix Status types are detailed in the LM Direct Reference Guide.

o [<GPS Off>]:

This field, if present, indicates if the GPS receiver is powered off. A value of

Off indicates that the LMU’ GPS receiver is off.

• LAT:

o <latitude>:

The current (or last known) latitude value provided by the LMU’s GPS

receiver. The value is in decimal degrees.

• LON:

o <longitude>:

The current (or last known) longitude value provided by the LMU’s GPS

receiver. The value is in decimal degrees.

• HDG:

o <heading>:

The current (or last known) heading value provided by the LMU’s GPS

receiver. The value is in degrees from true north.

• SPD:

o <speed km/h>:

The current (or last known) speed value provided by the LMU’s GPS

receiver. The value is in kilometers per hour

o <speed mph>:

The current (or last known) speed value provided by the LMU’s GPS

receiver. The value is in miles per hour.

• MID:

o <mobile ID>:

This will be the current mobile ID in use by the LMU.

o <mobile ID type>:

This will be the type of Mobile ID in use by the LMU. The available types

are, Off, ESN, IMEI, IMSI, USER, MIN and IP ADDRESS.