Note: PWM pin must be kept at low power level when module is in the power on procedure

Smart Machine Smart Decision 
4.14.1. PWM Multiplexing Function 
Table 32: PWM multiplexing function 
Pin name 
Pin number 
Mode 0(default) 
Mode 1 
PWM 
26 
PWM 
GPIO16 
Note: Multiplexing function need different software supply.
 
4.15. Network Status Indication 
Table 33: Pin definition of the NETLIGHT 
Pin name 
Pin number 
Description 
NETLIGHT 
64 
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 
SIM800H&SIM800L behavior 
Off 
SIM800H&SIM800L is not running 
64ms On/ 800ms Off 
SIM800H&SIM800L not registered the network 
64ms On/ 3000ms Off 
SIM800H&SIM800L registered to the network 
64ms On/ 300ms Off 
GPRS communication is established 
Reference circuit is recommended in the following figure: 
Figure 46: Reference circuit of NETLIGHT 
SIM800H&SIM800L_Hardware Design_V2.02 49 2015-07-27 

Smart Machine Smart Decision 
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. 

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