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#include <Servo.h>
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const  byte potMeterPin = A3;     // Potentiometer Port
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const byte buttonPin = 2; // Button pin for easier changing
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const long interval = 0; // Interval for speed
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int potMeterValue=0;  // Potentiometer initial value
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byte  rotation=0; // Rotation for servo
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unsigned long previousMillis = 0;  // will store last time LED was updated
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// Code taken from Sparkfun
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// Written & Modified by Ahmad Dahlan Hafizh
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// 28 Jan 2026
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///// HOW THE PROGRAM WORKS //////
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/// By default, Servo library does not have a speed control. Which means to get a speed, we need to have the rotation of the servo divided by certain amount of time to reach it
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/// In other words, we need a clock counter (blink without delay), and then apply that to the Sweeper class
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/// We also need to map out the potentiometer values to the speed
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///// CLASS SERVO /////
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class Sweeper
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{
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  Servo servo;              // the servo
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  int pos;              // current servo position
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  int increment;        // increment to move for each interval
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  int  updateInterval;      // interval between updates
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  int rotation;
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  unsigned long lastUpdate; // last update of position
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public:
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  // We can delete the need for passing int values in Sweeper() because we are going to use update
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  Sweeper()
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  {
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    lastUpdate = 0;
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  }
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  void Attach(int pin)
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  {
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    servo.attach(pin);
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  }
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  void Detach()
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  {
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    servo.detach();
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  }
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  // If we have update, then we also need to save the update information in the event that the button is not pressed, so that the counter doesn't reset. Let's add that.
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  void Update(int speed)
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  {
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    if((millis() - lastUpdate) > speed)  // time to update
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    {
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      lastUpdate = millis();
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      pos += increment;
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      servo.write(pos);
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      Serial.println(pos);
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      if ((pos >= 180)) // end of sweep
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      {
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        pos = 180;
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        increment = -1;
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      }
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      else if (pos <= 0)
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      {
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        pos = 0;
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        increment = 1;
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      }
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    }
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  }
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  void Rotation(int rotation)
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  {
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    servo.write(rotation);
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  }
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};
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Sweeper sweeper1;
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void setup()
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{
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  Serial.begin(9600);
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  pinMode(buttonPin, INPUT_PULLUP);
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  pinMode(potMeterPin,INPUT);  //potentiometer is an input=>it sends information to the computer
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  sweeper1.Attach(10);
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}
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void loop()
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{
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  // Read Potentiometer and map to a speed interval (e.g 5ms to 100ms)
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  int potValue =  analogRead(potMeterPin);
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  int speed = map(potValue, 0, 1023, 5, 100);
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  // Check button state
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  if (digitalRead(buttonPin) == LOW)
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  {
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    sweeper1.Update(speed);
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  }
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  // Debugging
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  static unsigned long lastPrint = 0;
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  if (millis() - lastPrint > 500) {
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    Serial.print("Speed Interval: ");
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    Serial.println(speed);
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    lastPrint = millis();
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  }
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}