Neoway WM620 - Running Status Indication; LED Indicator; Table 3-3 LED Indicator; Table 3-4 Network Status Indication (A)

WM620 Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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3.2 Running Status Indication
3.2.1 LED Indicator
Table 3-3 LED indicator
Pin Name
I/O
Function
Remarks
SIG_LED
O
Indicates running status
Min
Typical
Max
-0.3
2.6
2.9
When the module is running, the LED indicator is driven by the SIG_LED to indicate different running
status with its various blink behaviors. For details, see Neo_WM620 WCDMA Module AT Command Set.
Table 3-4 shows the default LED indication. The AT+SIGNAL=1 command allows users to modify it to
the indication status in Table 3-5.
Table 3-4 Network status indication (a)
Module Status
LED Status
1
Network is restricted; No SIM card; PIN is required;
Searching network; User authentication
Off
2
Standby status
On
3
PDP activated, obtained IP address
Blink (1.8s OFF/0.2s ON)
4
Socket link has been set up
Blink (0.2s OFF/ 1.8s ON)
Table 3-5 Network status indication (b)
Module Status
LED Status
1
Have registered 2G network and been idle
Blink (500ms ON / 1500ms OFF)
2
Have registered 3G network and been idle
Blink (100ms ON / 2900ms OFF
)
3
Searching networks
Blink twice (100 ms ON/100 ms OFF/100 ms
ON/2700 ms OFF)
4
Service (Voice or data)
Blink (125ms ON /125ms OFF)
The LED can be directly connected to this pin with a resistor in series. For better luminance, drive the
LED with a transistor instead. The LED's brightness depends on the value of R1 and VCC.