Troubleshooting And Safety Info; Troubleshooting; Safety Info - Queclink GL300M Series User Manual

GL300M Series User Manual

4. Troubleshooting and Safety Info

4.1. Troubleshooting

Trouble
After GL300M Series is
turned on, the CEL LED
always flashes quickly.
Messages can't be
reported to the backend
server by GPRS.
GL300M Series is unable
to power off.
There is no response
from UART when
GL300M Series is
configured by using
UART.
GL300M Series can't get
successful GPS fix.

4.2. 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 GL300M Series on the airplane or near medical equipment.
QSZTRACGL300MUM0001
Possible Reason
The signal is too weak; GL300M
Series isn't registered to the
network.
APN is wrong. Some APNs cannot
visit the internet directly.
The IP address or port of the
backend server is wrong.
The function of power key is
disabled by AT+GTFKS.
GL300M Series is unable to power
off if charger is connected or
external battery is used.
GL300M Series is in power saving
mode.
The GPS signal is weak.
Solution
Please move GL300M Series to
a place with good LTE
coverage.
Ask the network operator for
the right APN.
Make sure the IP address for
the backend server is an
identified address in the
internet.
Enable the function of power
key by AT+GTFKS.
Disconnect charger or external
battery and try again.
Remove the Data_Cable_M,
and plug it in again. After that,
GL300M Series will exit from
power saving mode for 10
seconds.
Re-try GL300M Series
Manager Tool to wake up the
device.
Please move GL300M Series to
a place with open sky.
It is better to let the top
surface (which comes with
LED indicators) face the sky.
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