![]() (Unless the time difference is more that 50 days. However if you wait too long then you miss the overflow update, and then the result returned will go down (i.e you will get 253, 254, 255, 0, 1, 2, 3 etc.Overflow is never really an issue if you always calculate time difference. Thus, even inside an ISR, you can rely on micros() updating. The Serial.print() function will also make the Arduino stop until the. The main purpose of this is to stop the car after 15 min of running and i want to run other code in the background. The delay() function will make the Arduino stop until your specified interval has expired. Ive got most of the code figgured out but i want an timer within an if statment. Im attempring to use an Arduino to remotely start my car. It then adds in the Timer 0 overflow count, which is updated by a timer overflow interrupt (multiplied by 256). Hello, Ive got my first Arduino project going so im quite the newb. It always reads the current hardware timer (possibly TCNT0) which is constantly being updated by the hardware (in fact, every 4 µs because of the prescaler of 64). The other answers are very good, but I want to elaborate on how micros() works.
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