#include <Servo.h>

Servo myServo;

int ldrPin = D1;
int servoPin = D0;

int minLDR = 60;
int maxLDR = 900;

int currentAngle = 0; // current position

void setup() {
  myServo.attach(servoPin);
  Serial.begin(115200);
}

void loop() {
  int ldrValue = analogRead(ldrPin);

    // Limit range
  ldrValue = constrain(ldrValue, minLDR, maxLDR);

    // Convert to target angle
  int targetAngle = map(ldrValue, minLDR, maxLDR, 0, 180);

    // Gradual movement (1 degree per cycle)
  if (currentAngle < targetAngle) {
    currentAngle++;
  } else if (currentAngle > targetAngle) {
    currentAngle--;
  }

  myServo.write(currentAngle);

  Serial.print("LDR: ");
  Serial.print(ldrValue);
  Serial.print(" Target: ");
  Serial.print(targetAngle);
  Serial.print(" Current: ");
  Serial.println(currentAngle);

    delay(15); // controls speed (lower = faster)
}