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Pin name Pin number Mode 0(default) Mode 1
PWM1 42 PWM1 GPIO4
PWM2 41 GPIO3 PWM2
SIM808_Hardware Design_V1.00 2014.03.27
50
4.16 Network Status Indication
Table 33: Pin definition of the NETLIGHT
Pin name
Pin number Description
NETLIGHT 50
Network Status Indication
The NETLIGHT pin can be used to drive a network status indication LED. The status of this pin is listed in
following table:
Table 34: Status of the NETLIGHT pin
Status SIM808 behavior
Off SIM808 is not running
64ms On/ 800ms Off SIM808 not registered the network
64ms On/ 3000ms Off SIM808 registered to the network
64ms On/ 300ms Off PPP GPRS communication is established
A reference circuit is recommended in the following figure:
Figure 48: Reference circuit of NETLIGHT
4.17 Operating Status Indication
The STATUS pin indicates the operating status of module. The pin output high when module power on, output is
low when module powered off.
Table 35: Pin definition of the STATUS
Pin name Pin number Description
STATUS 49
Operating status indication
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