Smart Machine Smart Decision
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
SIM800H behavior
Off
SIM800H is not running
64ms On/ 800ms Off
SIM800H not registered the network
64ms On/ 3000ms Off
SIM800H registered to the network
64ms On/ 300ms Off
GPRS communication is established
Reference circuit is recommended in the following figure:
Figure 44: Reference circuit of NETLIGHT
4.15.1.
NETLIGHT Multiplexing Function
Table 35: NETLIGHT multiplexing function
Pin name
Pin number
Mode 0(default)
Mode 1
NETLIGHT
64
NETLIGHT
GPIO17
Note: Multiplexing function need different software supply.
4.16.
Operating Status Indication
The pin4 is for operating status indication of the module. The pin output is high when module is powered on,
and output is low when module is powered off.
Table 36: Pin definition of the STATUS
Pin name
Pin number
Description
STATUS
4
operating
Status Indication
Note: For timing about STATUS, please reference to the chapter “4.2 power on/off scenarios”
SIM800H_Hardware_Design_V1.01
50
2013-08-20
