Product Info

LTE Module Series
EG21-G MINIPCIE Hardware Design
EG21-G_MINIPCIE_Hardware_Design 28 / 48
There are two indication modes for LED_WWAN# signal to indicate network status, which can be
switched through following AT commands:
 AT+QCFG=“ledmode”,0 (Default setting)
 AT+QCFG=“ledmode”,2
The following tables show the detailed network status indications of the LED_WWAN# signal.
Table 13: Indications of Network Status (AT+QCFG=“ledmode”,0, Default Setting)
Pin Status
Description
Flicker slowly (200ms High/1800ms Low)
Network searching
Flicker slowly (1800ms High/200ms Low)
Idle
Flicker quickly (125ms High/125ms Low)
Data transfer is ongoing
Always High
Voice calling
Table 14: Indications of Network Status (AT+QCFG=“ledmode”,2)
Pin Status
Description
Low Level (Light on)
Registered on network
High-impedance (Light off)
 No network coverage or not registered
 W_DISABLE# signal is at low level.
(Disable the RF)
 AT+CFUN=0, AT+CFUN=4
3.8.6. WAKE# Signal
The WAKE# signal is an open collector signal which is similar to RI signal, but a host pull-up resistor and
AT+QCFG=“risignaltype”,“physical” command are required. When a URC returns, there will be 120ms
low level pulse output as below.