Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 89 - CalAmp Proprietary & Confidential

This request only applies to the LMU-1000. It will cause the LMU-1000 to initiate a software

update from a server via HTTP.

The <new version number> is the 3-character version designation of the software to be

downloaded (e.g. 12a). The LMU software should combine this version with the current

App ID to build a file name for the update it is seeking to download. The format for the

filename is: LMU_<AppId>_<version>.jar (i.e. ‘LMU_086_12a.jar’).

The “URL of server” refers to the server from which the LMU requests the download. This

is an optional field which should default to URL of the Maintenance Server (i.e. PULS) if left

blank, or if the requested URL is unreachable.

Reprogram the SMS Inbound Address

!R9<S|C><dddddddddd>

This SMS message will change the SMS Inbound address to match the phone number of the

originating mobile. This setting is cleared on a power cycle.

If the C option is included, the SMS Inbound address is reset to a null string.

If the S option is included, the address change is saved to memory (i.e. a power cycle does

not clear the SMS Inbound value to null)

If the <dddddddddd> option is included, the SMS Inbound Address is change to the

<dddddddddd> string. This value is also saved to memory and will be retained through a

power cycle.

Request a Comm Status Report

!RC

This request will force the LMU to send an SMS Comm Status Message to the originating

mobile.

11.2.2 SMS Parameter Message

The SMS Parameter message is an augmentation of the !R1 request. It allows users to both

write and read LMU Parameter values remotely. The basic format is as follows:

!P<id><action><msg body>

The fields of the message are:

• <id>

A transaction ID used by server to match up response to request (4-bytes, ASCII-

Hex encoded)

• <action>

The Parameter Action type (1 byte, ASCII-Hex encoded)

0=Read Request

1=Write Request