Quectel LG77L EVB Manual de usuario

LG77L EVB User Guide

GNSS Module Series

Version: 1.0

Date: 2021-03-23

Status: Released

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Our aim is to provide customers with timely and comprehensive service. For any assistance,

contact our company headquarters:

Quectel Wireless Solutions Co., Ltd.

Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District, Shanghai

200233, China

Tel: +86 21 5108 6236

Email: info@quectel.com

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General Notes

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any liabilityfor any injury, loss or damage of anykindincurred by the use of orreliance upon the information.

All information supplied herein is subject to change without prior notice.

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While Quectel has made efforts to ensure that the functions and features under development are free from

errors, it is possible that these functions and features could contain errors, inaccuracies and omissions.

Unless otherwise provided by valid agreement, Quectel makes no warranties of any kind, implied or

express, with respect to the use of features and functions under development. To the maximum extent

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Safety Information

The following safety precautions must be observed during all phases of operation, such as usage, service

or repair of any terminal incorporating Quectel LG77L module. Manufacturers of the terminal should send

the following safety information to users and operating personnel, and incorporate these guidelines into all

manuals supplied with the product. Otherwise, Quectel assumes no liability for customers’ failure to comply

with these precautions.

Ensure that the product may be used in the country and the required environment,

as well as that it conforms to the local safety and environmental regulations.

Keep away from explosiveand flammable materials.The use of electronic products

in extreme power supply conditions and locations with potentially explosive

atmospheres may cause fire and explosion accidents.

The product must be powered by a stable voltage source, while the wiring must

conform to security precautions and fire prevention regulations.

Proper ESD handling procedures must be followed throughout the mounting,

handling and operation of any devices and equipment that incorporate the module

to avoid ESD damages.

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About the Document

Revision History

Document Information

Title

LG77L EVB User Guide

Subtitle

GNSS Module Series

Document Type

EVB User Guide

Document Status

Released

Version

Date

Description

2021-03-23

Creation of the document

1.0

2021-03-23

First official release

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Contents

Safety Information...................................................................................................................................... 3

About the Document.................................................................................................................................. 4

Contents...................................................................................................................................................... 5

Table Index.................................................................................................................................................. 6

Figure Index................................................................................................................................................ 7

1Introduction......................................................................................................................................... 8

2General Overview................................................................................................................................ 9

2.1. EVB KitAccessories .................................................................................................................. 9

2.2. Connecting Cables and Antenna to EVB................................................................................. 10

3Board User Interfaces....................................................................................................................... 11

3.1. EVB Top View............................................................................................................................11

3.2. Board User Interfaces...............................................................................................................11

4Using QCOM Tool to Communicate................................................................................................ 14

4.1. Communication via the Micro-USB Interface........................................................................... 14

5Using PowerGPS Tool to Test......................................................................................................... 15

5.1. COM Port and Baud Rate Setting............................................................................................ 15

5.1.1. Interface Explained ....................................................................................................... 16

5.2. PMTK Command Sending....................................................................................................... 17

5.3. Automatic TTFF Testing........................................................................................................... 18

6Firmware upgrade............................................................................................................................. 23

7Appendix A Reference...................................................................................................................... 27

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Table Index

Table 1: List of Accessories........................................................................................................................10

Table 2: Detailed EVB Interfaces............................................................................................................... 12

Table 3: J401 Pin Detailed Description......................................................................................................13

Table 4: PowerGPS Interface Explained.................................................................................................... 16

Table 5: Related Document........................................................................................................................ 27

Table 6: Terms and Abbreviations..............................................................................................................27

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Figure Index

Figure 1: EVB Kit Accessories .....................................................................................................................9

Figure 2: EVB and Accessories Assembly................................................................................................. 10

Figure 3: EVB Top View ..............................................................................................................................11

Figure 4: USB Ports ...................................................................................................................................14

Figure 5: COM Port Setting Interface of QCOM........................................................................................14

Figure 6: PowerGPS Main Interface (Not Connected) ..............................................................................15

Figure 7: PowerGPS Interface (Connected)..............................................................................................16

Figure 8: PMTK Command Sending via PowerGPS.................................................................................18

Figure 9: Disable These Options................................................................................................................19

Figure 10: Static TTFF Testing via PowerGPS.......................................................................................... 19

Figure 11: Select Reference Location........................................................................................................ 20

Figure 12: Click Use Mean Position...........................................................................................................20

Figure 13: Click Configuration.................................................................................................................... 21

Figure 14: Set TTFF Time-out (Sec)..........................................................................................................21

Figure 15: Click Run/Stop Button............................................................................................................... 22

Figure 16: Firmware Upgrade –Step 1......................................................................................................23

Figure 17: Firmware Upgrade –Step 2......................................................................................................24

Figure 18: Firmware Upgrade –Step 3......................................................................................................24

Figure 19: Firmware Upgrade –Step 4 and 5........................................................................................... 25

Figure 20: Firmware Upgrade –Step 6......................................................................................................25

Figure 21: Successful Firmware Upgrade .................................................................................................26

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1Introduction

This document provides information on how to develop and test the Quectel LG77L module using the

Evaluation Board (EVB). The EVB is a convenient tool that allows you to become familiar with the LG77L

module.

This document describes the interfaces on the EVB; how to test the module with the software tool

(PowerGPS); and how to upgrade the firmware.

The user guide is divided into several sections:

Chapter 2 provides the general overview of EVB Kit accessories;

Chapter 3 describes the EVB user interfaces;

Chapter 4 describes how to communicate with a module by using the QCOM tool;

Chapter 5 describes how to test the module by using the PowerGPS tool;

Chapter 6 describes how to upgrade the module;

Chapter 7 is an appendix, which summarizes the relevant documents, terms and abbreviations

appearing herein.

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2General Overview

2.1. EVB Kit Accessories

The EVB Kit includes: Evaluation Board (EVB),Active GNSS Antenna, Micro-USB Cable, USB Flash Drive,

Bolts and Coupling Nuts. The software tools are placed in the USB flash drive.

The EVB Kit accessories are shown in the figure below, and check Table 1 for details.

USB Cable

USB Flash Drive

Bolts and

Coupling Nuts

GNSS Antenna

EVB

Figure 1: EVB Kit Accessories

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