Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 102 - CalAmp Proprietary & Confidential

13.4

In some cases it may be necessary to upgrade the firmware of an LMU. The two main

reasons for performing a firmware upgrade are the addition of a new feature or a bug fix.

This section details how firmware updates can be performed on an LMU.

Downloading Firmware

13.5

Local firmware downloads are done from a laptop connected serially to the LMU. It is

recommended that firmware upgrades be performed via a wired connection (i.e. not over

Bluetooth) as any loss of communications during a firmware download may render the LMU

inoperable.

Downloading Firmware – Locally

Each type of LMU has a slightly different procedure to upgrade its firmware.

13.5.1 Local Firmware Upgrade

Most LMUs use the Ymodem protocol to upgrade its firmware. The only exception is the

LMU-1000™ product. These instructions assume access to the HyperTerminal application.

It may be possible to upgrade firmware via other applications, but they are not currently

supported by CalAmp.

1. Open the LMU HyperTerminal session. To create this session please refer to

Appendix D

2. Issue the AT Command

ATDNLD

The following response should appear:

ReadWaiting for the file to be sent ... (press ‘a’ to

abort)

3. From the Transfer menu click Send File…

4. Click the Browse button and locate the firmware file to be downloaded. Be advised

that firmware files are technology specific. That is, only GSM firmware should be

loaded on GSM LMUs. The file format should look similar to:

LMU_<technology>_<app>_<firmware rev>.bin

LMU_GSM_81_80b.bin