SIM340DZ EVB User Guide
3.6 Operating Status LED
Figure 9: StatusLED
Working state of status LED as list:
Name
Description
STATUS
M1
VBAT ON/OFF indicator
Bright
：
VBAT ON;
Extinct: VBAT OFF
M2 GSM_NET
status
indicator
Blinking at a certain frequency according various GSM net status
M3
GSM part status indicator
Bright: Module runs normally
Extinct: System is powered down or module runs
unconventionally
SIM340DZ-EVB_UGD_V2.01 Page 12 of 19
