Question

How to start a variable to keep track of time that has passed in arduino
I want a code on how to record how much time has passed and use it in an if statement

Arduino uses a form of C

Answer 1

ARDUINO CODE:

unsigned long start, seconds;

void setup()

{

    Serial.begin(9600); // Begin serial communication

    start = millis(); // Get starting time

}

void loop()

{

    // Get current time in milliseconds and convert it to seconds

    seconds = (millis() - start)/1000;

    // A short delay for better accuracy

    delay(100);

    // After 5 seconds, execute this if condition

    if(seconds > 5){

      Serial.print(seconds);

      Serial.println(" seconds elapsed");

      delay(1000);

    }

}

SERIAL OUTPUT:

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