LPM2100 bg NB Module Hardware Usage Guide
Shanghai Yuge Information Technology Co., Ltd.
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18
NETLIGHT
DO
Network status indication
Table 3-14 Network indication status
status
LED display status
Module not running or module not registered
Slow flash
Module is registering network
Fast flash
Module is connected to the network
Constantly bright
LED network indicator reference design is as follows
：
Figure 3-19 Network indicator circuit diagram
The size of the resistor in the network indicator circuit diagram can be adjusted
according to the LED lamp parameters.
3.12 General purpose GPIO interface
The LPM2100 bg series module provides two GPIOs. Some of these GPIOs can be
reused for multiple functions. Consult the module provider for specific usage.
Table 3-15 General GPIO Pin Definitions
Pin
Pin name
IO
Functional description
Remarks
31
GPIO_15
IO
Universal input/output port
Reserved
35
GPIO_14
IO
Universal input/output port
Reserved
3.13 Other interface
3.13.1 WAKEUP interface
The LPM2100 bg series module supports the PSM function, and wakes up the module by
pulling the WAKEUP pin on the 19-pin.
