![background image](http://html1.mh-extra.com/html/queclink/gv75/gv75_user-manual_3667838014.webp)
GV75 User Manual
TRACGV75UM00113
Figure 5: The Connection of UART with External Devices
3.8.
Indicator Light Description
Figure 6:GV75 LED
Table 8: Definition of Device Status and LED
Note:
1 - CEL LED cannot be configured.
2 - GPS LED and PWR LED can be configured to turn off after a period of time by using the
configuration tool.
3 - Fast flashing is about 60ms ON/780ms OFF.
4 - Slow flashing is about 60ms ON/1940ms OFF.
LED
Device Status
LED Status
CEL
(Note1)
Device is searching GSM network.
Fast flashing
(Note3)
Device has registered to GSM network.
Slow flashing
(Note4)
SIM card needs pin code to unlock.
ON
GPS
(Note 2)
GPS chip is powered off.
OFF
GPS sends no data or data format error occurs.
Slow flashing
GPS chip is searching GPS info.
Fast flashing
GPS chip has gotten GPS info.
ON
PWR
(Note 2)
No external power and backup battery voltage is lower
than 3.35V.
OFF
No external power and backup battery voltage is
below 3.55V.
Slow flashing
External power in and backup battery is charging.
Fast flashing
External power in and backup battery is fully charged.
ON
Queclink
Confidential