Index
 
  Reference for Wiring 1.0 (ALPHA) 0020+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.
Name  

pulseIn()

   
Examples   
int inpin = 0; 
int val = 0; 
 
void setup() { 
  pinMode(inpin, INPUT); 
} 
 
void loop() { 
  val = pulseIn(inpin, HIGH); 
}

Description   The pulseIn() method returns the length in microseconds on a digital input pin for a short period of time from 10 milliseconds to 3 minutes. It can be used to read sensors that return a pulse train like some accelerometers or rangers. The user can specify the counting on HIGH or LOW transitions. The pulseIn command stops all activity while executing. A timeout of 1 second (1000000 microseconds) prevents the command to wait forever. A specific timeout in microseconds can also be specified.
   
Syntax   
pulseIn(pin,transition)
pulseIn(pin,transition,timeout)
   
Parameters  
pin   int: the pin used for reading the pulse
transition   HIGH or LOW
timeout   int: a timeout value in microseconds
   
Returns   int
   
Usage   Application