const int buttonPin = 2;          // The digital pin for the button
const int analogInPin = 36;       // The analog input pin
//const unsigned long holdDuration = 1000; // Hold time in milliseconds (1 second)
const unsigned long holdDuration = 5000; // Hold time in milliseconds (1 second)

int heldValue = 0;                // Variable to store the "held" analog value
int buttonState = 0;              // Current button state
int lastButtonState = 0;          // Previous button state
bool valueHeld = false;           // Flag to indicate if a value is currently held
unsigned long holdStartTime = 0;  // Time when the value was sampled and held

void setup() {
  Serial.begin(115200);
  pinMode(buttonPin, INPUT_PULLUP); // Use internal pull-up resistor
}

void loop() {
  // Read the state of the button
  buttonState = digitalRead(buttonPin);

  // Check if the button state has changed (detects a press or release)
  if (buttonState != lastButtonState) {
    // If the button is pressed (LOW due to INPUT_PULLUP configuration)
    if (buttonState == LOW) {
      // if (digitalRead(2) == 0) {
      // If a value is not currently held, sample and hold the new value
      if (!valueHeld) {
        heldValue = analogRead(analogInPin); // Sample the analog value
        holdStartTime = millis();            // Record the time the value was held
        valueHeld = true;                    // Set the flag to indicate value is held
        Serial.print("Sampled and held new value: ");
        Serial.println(heldValue);
      }
      else {
        // Optionally, handle button presses while a value is held (e.g., ignore them)
        // Serial.print("  else =  ");
        // Serial.println(250);
      }
    }

    /////////////////
    else {
      // Optionally, handle button presses while a value is held (e.g., ignore them)
      Serial.print("  else =  ");
      Serial.println(250);
    }
    ///////////////////
    // Small delay for debouncing
    delay(500);
  }

  // Check if the held duration has passed
  if (valueHeld && (millis() - holdStartTime >= holdDuration)) {
    valueHeld = false; // Reset the flag, allowing a new sample
    Serial.println("Hold duration ended. Ready for new sample.");
  }
  Serial.print("  pin  =   ");
  Serial.print(analogRead(analogInPin ) - 20);
  Serial.print("  pinn  =   ");
  Serial.println(260);

  // Use the 'heldValue' for other parts of your code here, e.g., analogWrite() to an LED or display on screen
  // If no value is held, heldValue keeps its last sampled value until a new one is sampled

  // Update the last button state for the next iteration
  lastButtonState = buttonState;
}