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GNSS Module Series

LG77L EVB User Guide

LG77L_EVB_User_Guide 5 / 28

Contents

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

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

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

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

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

Introduction ......................................................................................................................................... 8

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

EVB Kit Accessories .................................................................................................................. 9

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

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

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

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

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

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

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

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

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

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

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

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

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

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Summary of Contents for LG77L EVB

Page 1: ...LG77L EVB User Guide GNSS Module Series Version 1 0 Date 2021 03 23 Status Released ...

Page 2: ...ce Disclaimer 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 th...

Page 3: ...ctel Transmitting reproducing disseminating and editing this document as well as using the content without permission is forbidden Offenders will be held liable for payment of damages All rights are reserved in the event of a patent grant or registration of a utility model or design Copyright Quectel Wireless Solutions Co Ltd 2021 All rights reserved ...

Page 4: ...y 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 explosive and 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 produc...

Page 5: ...8 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 ...

Page 6: ...ies 9 2 2 Connecting Cables and Antenna to EVB 10 3 Board User Interfaces 11 3 1 EVB Top View 11 3 2 Board User Interfaces 11 4 Using QCOM Tool to Communicate 14 4 1 Communication via the Micro USB Interface 14 5 Using 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 6 Firmware upgrade 23 7 Appendi...

Page 7: ...7L_EVB_User_Guide 6 28 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 ...

Page 8: ... 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 U...

Page 9: ...ow 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 des...

Page 10: ... 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 ...

Page 11: ...d Accessories Assembly Place the active GNSS antenna where it can detect the satellites with a clear view of the sky Items Description Quantity EVB Evaluation Board Size 60 mm 70 mm 1 USB Cable Micro USB Cable 1 GNSS Antenna Active GNSS Antenna Request the Antenna Datasheet from your local FAE 1 USB Flash Drive USB Flash Drive including the module related documents tools and drivers 1 Instruction ...

Page 12: ...RCE_ON Button S402 RESET_N Button S401 Indication LEDs D402 D403 Test Points J401 EVB top view is shown in the figure below D402 TXD indication LED J301 Antenna connector U101 LG77L module S402 FORCE_ON button S401 RESET_N button D403 PPS indication LED J401 Test points S201 Power switch J102 Micro USB connector Figure 3 EVB Top View 3 2 Board User Interfaces The EVB interfaces are detailed in the...

Page 13: ...put RF Input J301 Antenna Connector Support GPS L1 C A GLONASS L1 BeiDou B1I Use with the antenna provided with the Kit Signal Indication D402 TXD Indication LED Flash The module is turned on successfully Data output from UART TXD pin Extinct or Bright Failed to turn on the module D403 PPS Indication LED Flash Successful position fix The frequency is 1 Hz Extinct No position fix Switches and Butto...

Page 14: ...n TXD DO Transmits data RXD DI Receives data RESET_N DI Resets the module FORCE_ON DI Wakes up the module from backup mode ANT_DET DI Detects active antenna open circuit GND Ground JAM_DET DI Detects jamming signal 1PPS DO 1 pulse per second ANT_OK DI Detects active antenna short circuit ANT_OFF DO Controls active antenna power ...

Page 15: ...SB interface Step 2 Flip the power switch S201 to ON position to power on the EVB Step 3 Plug in the USB flash drive to the PC and run the provided driver installer to install the USB driver Step 4 View the USB port numbers in the Device Manager as shown in Figure 4 below Figure 4 USB Ports Step 5 Install the QCOM tool provided by Quectel The COM Port Setting interface of QCOM is shown in Figure 5...

Page 16: ... in the EVB Kit or request it from your local FAE 5 1 COM Port and Baud Rate Setting Step 1 Assemble the EVB accessories Step 2 Flip the power switch S201 to ON position to power on the EVB Step 3 Start the PowerGPS PowerGPS Trial 2 3 5 is used as an illustration in this document and select a correct COM port and baudrate the module supports 9600 bps by default at the bottom of the interface as sh...

Page 17: ...view GNSS information such as CNR message time position speed and precision in the PowerGPS interface To find out more about these parameters see the following table Table 4 PowerGPS Interface Explained Icon Explanation A satellite vehicle SV with PRN 65 If the SV is positioned near the center of the Sky View the SV elevation angle is close to 90 Dark Blue means that this satellite is being tracke...

Page 18: ...to noise ratio CNR is 49 dB Hz G stands for a GPS satellite B for a BeiDou satellite and S for an SBAS satellite Light blue column means that the navigation data of the satellite is in use PRN B3 CNR is 42 dB Hz White column indicates that the navigation data of this satellite is not in use UTC time Latitude degree Longitude degree Position fix The number of satellites being used Horizontal diluti...

Page 19: ... tests from 1 10 20 100 1000 and 10000 Click the Run button to start the test Click the Stop button to stop the test PowerGPS configuration steps for TTFF testing Step 1 When running a TTFF test these options need to be unchecked else it will affect the TTFF results These options include System time aiding Reference location aiding EPO aiding Q BD EPO aiding Click Setting menu to open the Options ...

Page 20: ...VB User Guide LG77L_EVB_User_Guide 19 28 Figure 9 Disable These Options Step 2 Click MTK menu and click Static TTFF Testing to enter Automatic TTFF Testing as shown in the figure below Figure 10 Static TTFF Testing via PowerGPS ...

Page 21: ...he figure below and select Reference Location tab Figure 11 Select Reference Location Step 4 Click on the Use Mean Position button as shown in the figure below and click OK Figure 12 Click Use Mean Position Step 5 Return to the Automatic TTFF Testing interface shown in the figure below and click Config to get to TTFF configuration interface ...

Page 22: ... the figure below and click OK If you select hot start it is recommended to set the TTFF Time out sec to 10 s If you select warm start you can set the TTFF Time out sec to 50 s Lastly if you select cold start you can set the TTFF Time out sec to 100 s TTFF Time out sec can help you to assess TTFF and save time Figure 14 Set TTFF Time out Sec ...

Page 23: ...22 28 Step 7 Click on the Run button to start the test OR Click on the Stop button to stop the test Figure 15 Click Run Stop Button Step 8 View the test results displayed visually in charts The test results are stored in the directory where the tool is installed ...

Page 24: ...ash drive in the EVB Kit or request it from your local FAE Before you start the upgrade process First Connect the EVB to a PC with a Micro USB cable Second Flip the power switch S201 to ON position to power on the EVB Firmware upgrade steps Step 1 Select the Settings click COM port and select the port of LG77L EVB USB as shown in the figure below Figure 16 Firmware Upgrade Step 1 ...

Page 25: ...ect 460800 as shown in the figure below Figure 17 Firmware Upgrade Step 2 Step 3 Left double click ROM and select firmware e g LG77LNR01A02SV02 bin as shown in the figure below Figure 18 Firmware Upgrade Step 3 Step 4 Click on the Download Agent button and select MTK_AllInOne_DA_MT3333 bin as shown in the figure below ...

Page 26: ...ware Figure 19 Firmware Upgrade Step 4 and 5 Step 6 Click the Go button to confirm as shown in the figure below Figure 20 Firmware Upgrade Step 6 Step 7 When the firmware upgrade is successful the progress bar will indicate 100 and there will be a green circle on the screen MTK Flash Tool appears as in the figure below ...

Page 27: ...GNSS Module Series LG77L EVB User Guide LG77L_EVB_User_Guide 26 28 Figure 21 Successful Firmware Upgrade ...

Page 28: ...COM_User_Guide QCOM User Guide Abbreviation Description 2D 2 Dimension 3D 3 Dimension BeiDou BeiDou Navigation Satellite System COM Port Communication Port CNR Carrier to Noise Ratio DI Digital Input DO Digital Output ESD Electrostatic Discharge EVB Evaluation Board GND Ground GNSS Global Navigation Satellite System GPS Global Positioning System I O Input Output LED Light Emitting Diode ...

Page 29: ...face Standard PC Personal Computer PI Power Input PMTK MTK Proprietary Protocol PO Power Output PPS Pulse Per Second PRN Pseudorandom Noise RXD Receive Data Pin SBAS Satellite Based Augmentation System SPS Standard Positioning Service SV Satellite Vehicle TTFF Time to First Fix TXD Transmit Data Pin USB Universal Serial Bus UTC Coordinated Universal Time WGS84 World Geodetic System 1984 ...

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