/*
  Forum: https://forum.arduino.cc/t/unexpected-activation-after-long-months-run/1385981
  Wokwi: https://wokwi.com/projects/432557652667267073


*/

// constants won't change. They're used here to set pin numbers:
int RPWM = 10;  //connect Arduino pin 10 to IBT-2 pin RPWM
int LPWM = 11;  //connect Arduino pin 11 to IBT-2 pin LPWM
int buttonPin = 2;  // the number of the pushbutton pin

// variables will change:
byte Speed = 0; // Intialize Varaible for the speed of the motor (0-255);
byte Move = 0; // Intialize Varaible for the speed of the motor (0-255);
int buttonState = 0;  // variable for reading the pushbutton status
int direction = 1;

void setup() {
  // setup code runs once:
  pinMode(10, OUTPUT); // Configure pin 10 as an Output
  pinMode(11, OUTPUT); // Configure pin 11 as an Output
  pinMode(buttonPin, INPUT_PULLUP); // Configure button
}

void loop() {
  //------------------------------------------------------------------------
  //------------------------------------------------------------------------
  // Check For Button Push
  buttonState = digitalRead(buttonPin);
  if (buttonState == LOW) {
    Move = 1; //set actuator to move state
  }
  else { //if no button is pushed, remain stationary
    Move = 0;
  }

  // Extend  Actuator ------------------------------------------------------
  if (Move == 1 && direction == 1) {

    // fade in from min to max in increments of 5 points:
    for (int fadeValue = 100; fadeValue <= 255; fadeValue += 5) {// sets the value (range from 0 to 255):
      analogWrite(10, fadeValue);
      analogWrite(11, 0);
      // wait for 85 milliseconds to see the dimming effect
      delay(85);
    }

    Move = 0; //Actuator reaches end of extension

    // Stop Actuator
    analogWrite(RPWM, 0);
    analogWrite(LPWM, 0);
    direction = 2; // Set to retract
  }

  else { //if no button is pushed, remain stationary
    analogWrite(RPWM, 0);
    analogWrite(LPWM, 0);
    Move = 0;
  }

  //-----------------------------------------------------------------------------------------
  //-----------------------------------------------------------------------------------------
  // Check For Button Push
  buttonState = digitalRead(buttonPin);
  if (buttonState == LOW) {
    Move = 1;
  }
  else { //if no button is pushed, remain stationary
    Move = 0;
  }

  // Retract  Actuator ----------------------------------------------------------------------
  if (Move == 1 && direction == 2) {

    // fade out from max to min in increments of 5 points:
    for (int fadeValue = 50; fadeValue <= 255; fadeValue += 5) {// sets the value (range from 0 to 255):
      // sets the value (range from 0 to 255):
      analogWrite(10, 0);
      analogWrite(11, fadeValue);
      // wait for 84 milliseconds to see the dimming effect
      delay(84);
    }

    Move = 0;
    // Stop Actuator
    analogWrite(RPWM, 0);
    analogWrite(LPWM, 0);
    direction = 1; // Set back to extend
  }

  else { //if no button is pushed, remain stationary
    analogWrite(RPWM, 0);
    analogWrite(LPWM, 0);
    Move = 0;
  }

}