#include <Servo.h>
Servo myServo;
const int trigPin = 9;
const int echoPin = 8;
void setup() {
myServo.attach(3);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
}
void loop() {
// Ultrasonic measurement
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
long duration = pulseIn(echoPin, HIGH);
int distance = duration * 0.034 / 2;
Serial.print("Distance: ");
Serial.print(distance);
Serial.println(" cm");
// Map distance to servo angle
int angle = map(distance, 0, 50, 0, 180);
angle = constrain(angle, 0, 180);
myServo.write(angle);
delay(1000);
}