User's Manual

7
WIFI:2.4GHz
5 Trouble shooting and Safety info
5.1 Trouble shooting
5.2 Safety info
The following items are suggestion for safety use, please pay more attention.
 Please do not disassemble the device by yourself.
 Please do not put the device on the overheating or too humid place, avoid exposure
to direct sunlight. Too high temperature will damage the device or even cause the
battery explosion.
 Please do not use AT Plus 4E on the airplane or near medical equipment.
FCC Caution.
§ 15.19 Labelling requirements.
This device complies with part 15 of the FCC Rules. Operation is subject to the
condition that this device does not cause harmful interference.
Trouble
Possible Reason
Solution
Messages can’t be
reported to the
backend server by
Mobile network.
APN is wrong. Some
APN can not visit the
internet directly.
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.
Unable to power off
AT Plus 4E.
The function of power key
was disabled by
AT+GTFKS.
Enable the function of power key by
AT+GTFKS.
Battery can not be
charged
The battery has not been
used for too long time and
has been locked.
Using a external power source with 3.6V
to 4.2V DC power supply to active the
battery or apply for after sale help.
AT Plus 4E can’t
fix GPS
successfully.
The GPS signal is weak.
Please move AT Plus 4E to a place with
open sky.
It is better to let the top surface face to
the sky. (The same surface with
indication LED)