Metro

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Repeat an action using the Metro library. Download the library and place it in the Arduino libraries folder.


/* Metro

 *
 * basic example to learn basic timing
 * using the Metro library :
 * http://www.arduino.cc/playground/Code/Metro

 * SensorAktor Workshop
 * Lab3 2008
 * Kunsthochschule fuer Medien Koeln
 * Academy of Media Arts Cologne
 * http://interface.khm.de

 * pin mapping SensorAktor Shield
 * import SensorAktor.h to get already defined mapping
 *
 * analog inputs: analog0 = pin0, analog1 = pin1, analog2 = pin2, 
 * analog3 = pin3, analog4 = pin4, analog5 = pin5
 * built-in poti: poti = pin5
 * amplified input: mic = pin0
 * switches: switch1 = pin1, switch2 = pin2, switch3 = pin3
 * leds: led1 = pin3, led2 = pin5, led3 = pin6
 * power outs: out1 = pin3, out2 = pin5, out3 = pin6
 * motor outs: motor1_1 = pin8, motor1_2 = pin13, motor2_1 = pin11, motor2_2 = pin12
 * motor pwms: pwmMotor1 = pin10, pwmMotor2 = pin9
 * servo outs: servo1 = pin2, servo2 = pin4, servo3 = pin7

 */

// include sensor aktor library for pin mapping
#include <SensorAktor.h>
// include Metro library for timing actions
#include <Metro.h>

// create a Metro named ledMetro
Metro ledMetro = Metro(250);
// create a variable that knows if led1 is LOW or HIGH
int ledState = LOW;

// this block is executed one time when programm starts
void setup() {
  pinMode(led1, OUTPUT);
  // turn of the light
  digitalWrite(led1, ledState);
}

// this block is executed in a loop after setup is called one time
void loop(){
  // if the metro says it is time
  if (ledMetro.check()) {
    // check if the led is on or off and switch it accordingly
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }
    // finally set led
    digitalWrite(led1, ledState);
  }
}


Files needed

Since Arduino 0015 there are some problems with the old “SensorAktor.h” file.

Use this one instead.


SensorAktor.zip

metro.zip