Hi all ! I have this fuction in my loop "duration=pulseIn(pin,HIGH);" which needs time… and my proble is the receive SMS cant get it, because of the fuction. What can i do ? i have arduino UNO and GSM SIM900 S2-1040S-Z0955

problem with receive SMS

system May 8, 2014, 8:08pm 4

How can we reduce the number of pulses to gain time ? can i do something to fuction ?

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