Queclink GL521MG LTE Standby Tracker with Wireless Charging User Manual
- June 4, 2024
- Queclink
Table of Contents
GL521MG User Manual
EGPRS/LTE Cat-M1/LTE Cat-NB2/GNSS Tracker
QSZTRACGL521MGUM0100
Version: 1.00
| Document Title | GL521MG User Manual |
|---|---|
| Version | 1.00 |
| Date | 2021-11-28 |
| Status | Released |
| Document Control ID | QSZTRACGL521MGUM0100 |
General Notes
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 based upon requirements specifically provided to Queclink by the customers. Queclink has not undertaken any independent search for additional relevant information, including any information that may be in the customer’s possession. Furthermore, system validation of this product designed by Queclink within a larger electronic system remains the responsibility of the customer or the customer’s system integrator. All specifications supplied herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of Queclink. 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 are reserved in the event of a patent grant 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
Revision History
| Revision | Date | Author | Description of Change |
|---|---|---|---|
| 1.00 | 2021-11-28 | Heymi Lin | Initial |
Introduction
GL521MG is an IP67 waterproof GNSS tracker that features up to 1-year standby
time powered by internal batteries and supports wireless charging. The device
is ideal for asset monitoring & lot management that require tamper detection &
temperature monitoring. GL521MG supports LTE Cat M1/NB2 network on multiple
bands for operation in America, Europe, and Oceania with a fallback to GPRS.
1.1. GL521MG Product
Table 1. GL521MG Product
Model No.| Region| Technology| LTE Category| Operating
Band
---|---|---|---|---
GL521MG| Global| GSM/LTE| eMTC/NB-IoT| GSM850/GSM900/DCS1800/PCS1900
LTE-FDD:
B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/
B20/B25/B26/B27/B28/B66/B85
LTE-FDD:
B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/
B20/B25/B28/B66/B71/B85
1.2. Reference
Table 2. GL521MG Protocol Reference
| SN | Document Name | Remark |
|---|---|---|
| [1] | GL521M Series @Track Air | The air interface protocol between GL521MG and |
1.3. Terms and Abbreviations
Table 3. GL521MG Terms and Abbreviations
| Abbreviation | Description |
|---|---|
| RXD | Receive Data |
| TXD | Transmit Data |
| GND | Ground |
Product Overview
2.2. Key Description
Table 4. GL521MG Key Description
Key Functions| To power on: Long press for more than 3 seconds To check the
device status: Press the key for one time To power off (needs to be
configured): Long press for more than 3s after powering on
---|---
2.3. LED Description
There are two LEDs on GL521MG. They can work separately and in combination to
indicate the status of the device. For the details when they work separately,
please see the table below:
Table 5. GL521MG LED Description (work separately)
| LED | Event | State |
|---|---|---|
| Status LED (Green) | Searching network | Fast flash |
| The device has been registered on the network | Slow flash | |
| SIM is locked by a PIN | Solid on | |
| Network modem off | Solid off | |
| GPS LED (Blue) | GPS is in the process of fixing | Fast flash |
| GPS is on and GPS gets fixed | Slow flash | |
| GPS off | Solid off |
Fast flash: 100ms on/200ms off
Slow flash: 200ms on/1000ms off
Note : The LEDs will be on about 5 minutes after power on. After that,
they will always be off.
When they work in combination, the details are described as below:
Table 6. GL521MG LED Description (work in combination)
During power on| Both the LEDs will be on to indicate the device is being
powered on.
---|---
When checking the device status| Both the LEDs will be on to indicate the
device still works.
During power off| Both the LEDs will flash simultaneously to indicate the
device is being powered off.
During charging| Both the LEDs will flash simultaneously to indicate the
device is being charged.
When fully-charged| Both the LEDs will be solid on to indicate the device is
fully charged.
2.4. Parts List
| Name | Picture | Descript ion |
|---|---|---|
| GL521MG Locater | | EGPRS/LTE Cat-Ml/LTE Cat-
NB2/GNSS Tracker
GL521MG Back Glue| | Used to install GL521MG
GL521MG Magnetic Case (Optional)|
|
Used to install GL521MG on metal surface for convenient taking off
GL521MG Plastic Bracket (Optional)|
| Used to hold GL521MG Series on plastics bracket which
is installed on surfaces where screw holes can be drilled
GL521MG Data Cable (Optional)|
| USB
data cable which can be used for firmware upgrade and configuration
GL521MG Wireless Charger Accessory Kit|
| For
battery charging
Note: Remove the magnetic case when charging the device with the wireless charger kit
Interface Definition
GL521MG has an internal 4-pin connector. It can be used to configure the device. The definition of the pins is in the following table.
Table 8. Description of 4-pin Connections
| Index | Pin Name | Description |
|---|---|---|
| 1 | USB_5V | Not used |
| 2 | RXD | MCU UART RXD |
| 3 | TXD | MCU UART TXD |
| 4 | GND | Power and digital ground |
Getting Started
4.1. Opening and Closing the Case
To open/close the case: Unfasten or tighten the 4 screws at the backside.
4.2. Turning on/off the Device
To turn on: Long press
the key for more than 3 seconds.
To turn off (needs to be configured): Long press for more than 3s after power
on.
4.3. Installing a SIM Card
Power off the device first and then install the SIM card.
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 surfaces or in enclosed environments having difficulty in getting GPS and network signals.
Note : If the magnetic or plastic bracket is used to hold the device,
please apply the force to fasten the bracket screw as follows, otherwise, the
device case may be damaged.
(0.6±0.2kgf/cm², excessive force may cause damage to the device).
Troubleshooting and Safety Info
6.1. Troubleshooting
Table 9. GL521MG Troubleshooting List
| Trouble | Possible Reason | Solution |
|---|---|---|
| After the device is turned on, the Status LED always flashes quickly. | The | |
| signal is too weak. The device isn’t registered to the network. | Please move |
the device to a place with the good network coverage.
Messages can’t be reported to the backend server by the network.| APN is not
right.| Ask the network operator for the right APN.
The IP address or port of the backend server is wrong.| Make sure the IP
address for the backend server is an identified address in the internet.
There is no response from UART when the device is configured by using UART.|
The port is not ready or the device is not powered on.| Please check the port
and the device to ensure they are working properly.
The device can’t get a GPS fixed.| The GPS signal is weak.| Move the device to
a place under the open sky.
It is better to make the side with the antenna face the sky.
6.2. Safety Info
- Do not disassemble the device by yourself.
- Do not put the device in an overheated or too humid place, and avoid exposure to direct sunlight. Too high a temperature will damage the device or even cause a battery explosion.
- Do not use the device on the airplane or near medical equipment.
Appendix: Supported Accessories
- GL521MG Wireless Charger Accessory Kit
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE : The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment. Such
modifications could void the user’s authority to operate the equipment.
NOTE : This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help
This device and its antenna(s) must not be co-located or operating in
conjunction with any other antenna or transmitter.
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
a minimum distance of 20 cm between the radiator and your body. This
transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter
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