Led_Wwan# Signal - Quectel EC200T Series Hardware Design

3.10.5. LED_WWAN# Signal

The LED_WWAN# signal of
module, and can absorb a current up to 40mA. According to the following circuit, in order to reduce the
current of the LED, a resistor must be placed in series with the LED.
The LED is emitting light when the LED_WWAN# output signal is low.
Figure 12: 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 14: Indications of Network Status (AT+QCFG="ledmode",0, Default Setting)
Pin Status
Flicker slowly (200ms Low/1800ms High)
Flicker slowly (1800ms Low/200ms High)
Flicker quickly (125ms Low/125ms High)
Always Low
Table 15: Indications of Network Status (AT+QCFG="ledmode",2)
Pin Status
Low Level (Light ON)
High Impedance (Light OFF)
EC200T_Series_Mini_PCIe_Hardware_Design
EC200T Series Mini
Description
Registered on network successfully
 No network coverage or not registered
 W_DISABLE# signal is at low level. (Disable RF)
LTE Standard Module Series
EC200T Series Mini PCIe Hardware Design
PCIe is used to indicate the network status of the
Description
Network searching
Idle
Data transfer is ongoing
Voice calling
33 / 54