9. Single Double Click and Long Press Detection

How do you plan to solve it?

 We connect the switch to one GPIO pin and a ground. We use pull-up Resistors, to make sure that when the switch is pressed, it indicates a LOW. Using delay, we can figure out if it was a single press, a double press or a long press.
 

/*Paste your code here*/

int buttonPin = 7;

void setup() {
    pinMode(buttonPin, INPUT_PULLUP);
    Serial.begin(9600);
}

void loop() {
    if (digitalRead(buttonPin) == LOW) {
        delay(30); // debounce

        if (digitalRead(buttonPin) == LOW) {
            unsigned long pressStart = millis();

            // Wait until button is released
            while (digitalRead(buttonPin) == LOW);

            unsigned long pressDuration = millis() - pressStart;

            if (pressDuration > 1000) {
                Serial.println("Long Press Detected");
            } 
            else {
                // Check if another press follows quickly
                delay(250); // "double press" window
                if (digitalRead(buttonPin) == LOW) {
                    delay(30); // debounce
                    if (digitalRead(buttonPin) == LOW) {
                        Serial.println("Double Press Detected");
                        while (digitalRead(buttonPin) == LOW); // wait release
                    }
                } else {
                    Serial.println("Single Press Detected");
                }
            }
        }
    }
}

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