Smart Machine Smart Decision
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
