SunTech ST4940 - Page 16

Doc. Title
ST4940 User Manual
Concerning:
Rev.
Date (dd-mm-yy)
Page of Pages
Features and how to configure ST4940
1.07
0
1-7-2019
16 of 52
Blue& Red
LEDs
(2 colors)
GSM/LTE M1 network & Operating Status indicator
Right after the device is turned on, the blue LED starts to blink as below. Five (5) minutes after
the blue LED starts to blink, it is turned off automatically to save battery. If you press the power
button again, the blue LED will be on just for short time, for some seconds, to show you the
current status of the GSM/LTE M1 network connectivity.
 Network OK: 1 time
 Server communication Error : 2 times
 GPRS/LTE M1 Communication Error : 3 times
 No GSM/LTE M1 (= not connected with the GSM/LTE M1 network): 4 times.
 SIM PIN Locked : 5 times
 Impossible to connect with the GSM/LTE M1 network : 6 times
 No SIM Error (= an error when SIM is not available) : 7 times
 SIM PUK Locked : 8 times
In addition to the status described above, the blue LED continues to blink either if the device
has an error of SIM Locking or if it does not have a SIM. .
If you press ‘power button’ of device shortly, the Red LED indicates the operation status of the
device by showing number of blinking as below.
 1 time of blinking means  status of Power Off
 2 times of blinking mean  status of hibernation
 3 times of blinking mean status of Power Off and battery discharged. It means that
it is time to charge the battery
Battery LEDs
(3 colors)
Battery indicator
Normally, it blinks shortly to indicate the battery level for user as described below.
 Red LED blinks twice shortly. under 10% of the full capacity
 Red LED blinks. under30% of the full capacity.
 Amber LED blinks.  30% to 80%
 Green LED blinks.  80% to 100%
 Green LED is on.  Charging has been completed.
During the charging time, the battery LED blinks continuously. But, the battery LED is turned
on when charging the battery is completed.