User's Manual
Table Of Contents
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
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