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Κώδικας: Επιλογή όλων

#include <MsTimer2.h>

volatile unsigned long _Uptime =0;

void updateuptime() {
_Uptime++;
}

unsigned long getUpTime()
{
    unsigned long ret;
    // optional: disable interrupts
    cli();
    ret = _Uptime;
    // optional: enable interrupts 
    sei();
    return ret;
}

void setup() {
  MsTimer2::set(1000, updateuptime); 
  MsTimer2::start();
  Serial.begin(9600);
  
}

void loop() {
 
   Serial.println (_Uptime);
    delay (1000);
 
    
}