GL320M Series User Manual

EGPRS/LTE Cat-M1/LTE Cat-NB2/GNSS Tracker

QSZTRACGL320MUM0100
Version: 1.00
GL320M Series User Manual

Document Title GL320M Series User Manual

Version 1.00

Date 2021-04-06

Status Released

Document Control ID QSZTRACGL320MUM0100

General Notes

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Queclink offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Queclink. The information provided is

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based upon requirements specifically provided to Queclink by the customers. Queclink has not

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undertaken any independent search for additional relevant information, including any

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information that may be in the customer’s possession. Furthermore, system validation of this

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product designed by Queclink within a larger electronic system remains the responsibility of the

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customer or the customer’s system integrator. All specifications supplied herein are subject to

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change.

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Copyright

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This document contains proprietary technical information which is the property of Queclink.

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Copying of this document, distribution to others or using or communication of the contents
thereof is forbidden without express authority. Offenders are liable to the payment of damages.
All rights reserved in the event of grant of a patent or the registration of a utility model or design.
All specifications supplied herein are subject to change without notice at any time.

Copyright © Queclink Wireless Solutions Co., Ltd. 2021

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GL320M Series User Manual

Contents
0. Revision History ............................................................................................................................. 1
1. Introduction .................................................................................................................................. 2
1.1. GL320M Series Product ...................................................................................................... 2
1.2. Reference ........................................................................................................................... 2
1.3. Terms and Abbreviations .................................................................................................... 2
2. Product Overview .......................................................................................................................... 3
2.1. Product Appearance ........................................................................................................... 3
2.2. Key/Type-C Interface Description....................................................................................... 3
2.3. LED Description .................................................................................................................. 4

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2.4. Parts List ............................................................................................................................. 5

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3. Interface Definition ....................................................................................................................... 6

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4. GL320M Device Cable Color (Optional Extension Cable) .............................................................. 7

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5. Getting Started .............................................................................................................................. 8
5.1. Battery Charging ................................................................................................................. 8

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5.2. Turning On/off the Device .................................................................................................. 8

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5.3. External Power Supply Connection .................................................................................... 9

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5.3.1. External DC Charger Connection ............................................................................. 9

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5.3.2. External Battery Connection ................................................................................... 9

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5.4. Ignition Detection............................................................................................................. 10

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5.5. External Input Connection ............................................................................................... 11
6. Installation Precautions ............................................................................................................... 12
7. Troubleshooting and Safety Info ................................................................................................. 13
7.1. Troubleshooting ............................................................................................................... 13
7.2. Safety Info ........................................................................................................................ 13
8. Appendix: Supported Accessories ............................................................................................... 14

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GL320M Series User Manual

0. Revision History

Version Date Author Description of Change

1.00 2021-04-06 Arry Wang Initial

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GL320M Series User Manual

1. Introduction

The GL320M Series is water resistant GPS trackers designed for lone worker, vehicle, pet and
asset tracking applications. The thumb sized button makes the series ideal for applications
requiring rapid emergency alert or setting of Geo-fences based on current locations. The built-in
GPS receiver has superior sensitivity and fast initial positioning. The LTE allows the GL320M
location to be monitored in real time or periodically tracked by a backend server or other
specified terminals. The built-in 3-axis accelerometer allows motion detection and sophisticated
power management algorithms extend battery life. System integration is straightforward as
complete documentation is provided for the full featured @Track protocol. The @Track protocol

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supports a wide variety of reports including emergency, Geo-fence boundary crossings, low

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battery and scheduled GPS position reports.

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1.1. GL320M Series Product

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Table 1. GL320M Series Product

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Model No. Region Technology LTE Category Operating Band

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Cat M1/Cat NB2:
Cat M1:

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B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/
B20/B25/B26/B27/B28/B66/B85

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GL320MG Global GSM/LTE eMTC/NB-IoT
Cat NB2:
B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/
B20/B25/B28/B66/B71/B85
EGPRS: 850/900/1800/1900MHz

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1.2. Reference
Table 2. GL320M Series Protocol Reference

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SN Document Name Remark

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[1] GL320M Series @Track Air Interface The air interface protocol between GL320M
Protocol series and backend server.

1.3. Terms and Abbreviations

Table 3. GL320M Series Terms and Abbreviations

Abbreviation Description
RXD Receive Data
TXD Transmit Data
IGN Ignition

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 GL320M Series User Manual

2. Product Overview

2.1. Product Appearance

Power Key

LEDs Type-C

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Function Key

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Figure 1. GL320M Product View

2.2. Key/Type-C Interface Description

Table 4. GL320M Button/Mini USB Interface Description

⚫ Turn on GL320M

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Power Key ⚫ Turn off GL320M when it is not being charged (if the power key
is enabled).

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⚫ Geo-fence mode
Long press the key to enable/disable Geo-fence ID0.

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⚫ Geo-fence around the current position mode
Long press the key to enable/disable Geo-fence ID0. If
Function Key
Geo-fence ID0 is enabled, the current position is used as the
center of Geo-Fence ID0.
⚫ SOS mode (default)
Long press the key to activate SOS alarm.
⚫ Connecting a 5V DC adapter to power up GL320M and charge
the internal battery.
⚫ Connecting a 3.7V Li-ion or Li-Polymer battery to power up
Type-C Interface
GL320M.
⚫ Backend server developer or administrator can use the Data
Cable to configure GL320M.

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GL320M Series User Manual

2.3. LED Description

LED

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Figure 2. GL320M LEDs

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There are three LEDs on GL320M. For details, please see the table below.

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Table 5. GL320M LED Description

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LED Device Status LED Status
Searching for network Fast flash
The device has been registered to network. Slow flash
CELL LED Power off Dark
SIM-PIN locked Solid
<LED On> is set to 2. Dark

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GPS has fixed a position. Solid

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GPS is in the process of fixing. Fast flash
GPS is on and GPS data is wrong. Slow flash
GPS LED GPS is off. Dark

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150 seconds have passed after power on when <LED On> is Dark
set to 2.
<LED On> is set to 2. Dark
Power on and normal Dark
Charger inserted and charging completed Solid
Charger inserted and charging Fast flash
Power key is pressed to power off the device. Fast flash
PWR LED
Abnormal Fast flash
Power low alert Slow flash
The power light is turned off by command. Dark
<LED On> is set to 2. Dark
Note: Please refer to GL320M Series @Track Air Interface Protocol for the settings of <LED
On>.

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GL320M Series User Manual

2.4. Parts List

Table 6. GL320M Parts Lists

Name Picture Description

EGPRS/LTE Cat-M1/LTE
GL320M Locater
Cat-NB2/GNSS Tracker

AC-DC Power

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Adapter Used to charge the internal

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(standard battery of GL320M

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accessory)

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AC-DC Power

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Adapter (fast Used to charge the internal
charging) battery of GL320M
(Optional)

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USB data cable which can be used
GL320M Data
for firmware upgrade and device
Cable (Optional)
configuration

Extension cable which allows the

GL320M connection to the charger
Extension Cable interface and external battery
(Optional) interface as well as the ignition
detection interface on GL320M

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GL320M Series User Manual

3. Interface Definition

The GL320M has a 12-pin (two sides) Type-C interface which contains the connections for power,
ignition detection, input, etc. The sequence and definition of the 24-pin connector are shown in
the following figure:

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Figure 3. 12-pin (two sides) Type-C Interface of the GL320M

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Table 7. Description of 24-pin Connections

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Pin No. Pin Name Function Description

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1 GND Power GND
2 IN1 Negative input1
3 IGN Input/ADC_IN1 The ignition input(0--24V)/PT100 AD Output (0--3.0V)
4 VBUS USB+5.0V
5 CC1 Charging protocol

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6 USB DP LTE module USB DP
7 USB DM LTE module USB DM

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8 EXTBAT /VDD OUT External battery input/3.0--3.9V Output
9 VBUS USB+5.0V
10 UART_RXD Debug Receive Data

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11 UART_TXD Debug Transmit Data
12 GND Power GND

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GL320M Series User Manual

4. GL320M Device Cable Color (Optional Extension Cable)

GL320M Extension Cable has a Type-C connector with six wires which allows the connection to
the external power interface, ignition detection interface and input interface for GL320M. Please
find the details in the following table.

Figure 4. GL320M Device Cable Color

Color Name Cable

RED External DC IN (5V)

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Black Ground
Blue External Battery IN (DC 3.4V to 4.2V)

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White Ignition Detection

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Green NSW (negative trigger input)

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GL320M Series User Manual

5. Getting Started

5.1. Battery Charging

1. Connect AC-DC power adapter to GL320M.
2. Insert the AC-DC power adapter into the power socket.
3. During charging, the PWR LED flashes fast. When the battery is fully charged, the PWR
LED will be always on.
4. You can also charge the battery via USB cable which connects GL320M to the PC.
5. Charging time is about 3.5 hours.

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Note:
Before using GL320M for the first time, please fully charge the battery.

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5.2. Turning On/off the Device

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To turn on the device:

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◆ Method 1: Press the Power key at least 3 seconds and then release it to turn on

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GL320M. At the same time, PWR LED will also turn on.

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◆ Method 2: Connect the device to the charger or external battery. The device will turn
on automatically, and PWR LED will also turn on.

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To turn off the device:
◆ Method 1: Press the power key about 2 seconds. PWR LED will flash fast and then turn

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off. It indicates that GL320M is turned off. The time needed to power off the device
depends on the quality of the network. The maximum time needed for power off is 90
seconds. This method is only valid for turning off the device when internal battery is
used. Please note the end-user cannot power off GL320M through Method 1 when the
power key is disabled by Protocol.

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◆ Method 2: If external battery is used, the device will power off when the external
battery is disconnected.

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GL320M Series User Manual

5.3. External Power Supply Connection

5.3.1. External DC Charger Connection

Pin 4 and Pin 9 on the Type-C connector is used for charging and named as VBUS pins. It can be
connected to a 5V DC power supply to power up GL320M and charge the internal battery.

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Figure 5. External DC Charger Connection of GL320M

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5.3.2. External Battery Connection

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Pin 8 on the Type-C USB connector is for external battery and named as EXTBAT pin. It can be
connected to a 3.7V Li-ion or Li-Polymer battery to power up GL320M.

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GL320M Series User Manual

5.4. Ignition Detection

Pin 3 on the Type-C connector is for ignition detection when GL320M is used in vehicle tracking
application. It is named as IGN_INPUT pin.

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Another easy way is to connect PIN3 to a power output which is only enabled when the vehicle is
ignition on (e.g. the power output for radio FM) in the fuse box of the vehicle.

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GL320M Series User Manual

5.5. External Input Connection

Pin 2 on the Type-C USB connector is a negative trigger input. It is named as IN1 pin.
For negative trigger input, the electrical characteristics are:
Logic State Electrical Characteristics
Active 0V to 0.8V
Inactive 1.7V to 32V or Open loop
An input example is shown as the following figure:

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GL320M Series User Manual

6. Installation Precautions

◆ Firmly install the device to a reliable surface to prevent falling off.

◆ Make the side with antenna face sky to have better signal reception.
◆ Do not install the device under metal surface or in enclosed environments having
difficulty in getting GPS and network signal.

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GL320M Series User Manual

7. Troubleshooting and Safety Info

7.1. Troubleshooting
Table 8. GL320M Troubleshooting List

Trouble Possible Reason Solution

After the device is turned The signal is too weak. The
Move the device to a place with
on, the CEL LED always device isn’t registered to the
good network coverage.
flashes quickly. network.

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Ask the network operator for
APN is not right.
the right APN.
Messages can’t be

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Make sure the IP address for

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reported to the backend
The IP address or port of the the backend server is an

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server by network.
backend server is wrong. identified address in the

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internet.

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The function of power key is Enable the function of power

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disabled by AT+GTFKS. key by AT+GTFKS.
The device cannot be

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The device cannot be powered

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powered off. Disconnect charger or external
off if charger is connected or
battery and try again.
external battery is used.

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There is no response
Please check the port and the
from UART when the The port is not ready or the
device to ensure they are
device is configured by device is not powered on.
working properly.
using UART.
Move the device to a place

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The device can’t get GPS under open sky.
The GPS signal is weak.
fix.

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It is better to make the side
with antenna face the sky.

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7.2. Safety Info
⚫ Do not disassemble the device by yourself.
⚫ Do not put the device in the overheated or too humid place, and avoid exposure to
direct sunlight. Too high temperature will damage the device or even cause battery
explosion.
⚫ Do not use GL320M on the airplane or near medical equipment.

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GL320M Series User Manual

8. Appendix: Supported Accessories

◆ External large volume battery pack

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