5G Module Series
RG255C-GL_Mini_PCIe_Hardware_Design 32 / 57
Figure 14: LED_WWAN# Signal Reference Circuit Diagram
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 15: Indications of Network Status (AT+QCFG="ledmode",0, Default Setting)
Flicker slowly (200 ms Low/1800 ms High)
Flicker slowly (1800 ms Low/200 ms High)
Flicker quickly (125 ms Low/125 ms High)
Data transmission is ongoing
Table 16: Indications of Network Status (AT+QCFG="ledmode",2)
Registered on network successfully
High-Impedance (Light OFF)
⚫ No network coverage or not registered
⚫ W_DISABLE# signal is at low level. (RF disabled.)
⚫ AT+CFUN=0, AT+CFUN=4 input
4.5.6. WAKE#
The WAKE# signal is an open collector signal, which is similar to RI signal, but a pull-up resistor and
AT+QCFG="risignaltype","physical" are required to wake up the host. When a URC returns, a 120 ms
low level pulse will be outputted. The state of WAKE# signal is shown as below.
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