#define BLYNK_TEMPLATE_ID "TMPL3AiMCC9MH"
#define BLYNK_TEMPLATE_NAME "Ultrasonic and servo motor"
#define BLYNK_AUTH_TOKEN "sGqVArnTAes7xXdy_pdbyu6dyjy28026"

BLYNK_WRITE(V0)
{
  SERVOANGLE=pa
}

#include <Servo.h>

// Define pins
#define trigPin 22
#define echoPin 21
#define servoPin 2

long duration;
int distance;
const int trig=22;
const int echo=21;

void setup(){
  Serial.begin(9600); // Initialize serial communication
  pinMode(trigPin, OUTPUT); // Set trigger pin as output
  pinMode(echoPin, INPUT); // Set echo pin as input
  servo.attach(2); // Attach servo to specified pin
  }

void loop(){
    long duration = measureDistance();
    float distanceCm = duration * soundSpeed / 2.0 / 10000.0;
    Serial.print("Distance: ");
    Serial.print(distanceCm);
    Serial.println(" cm");
  }

    if (distanceCm < distanceThreshold) {
    servo.write(90); // Move servo to 90 degrees
    } else {
    servo.write(0); // Move servo to 0 degrees
    }

    delay(500); // Delay between measurements
    }

    long measureDistance() {
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    return pulseIn(echoPin, HIGH);
    }