SIM900 EVB User Guide
SIM900-EVB_UGD_V1.01
13
08.12.2009
3.6 Operating Status LED
Figure 9: StatusLED
Working state of status LED as list:
Name
Description
STATUS
Q1
VBAT ON/OFF indicator
Bright
:
VBAT ON;
Extinct: VBAT OFF
Q2
GSM part status indicator
Bright: Module runs normally
Extinct: System is powered down or module runs
unconventionally
Q3 GSM_NET
status
indicator
Blinking at a certain frequency according various GSM net status