#include <ESP32Servo.h>

#define Fire 18
#define BUZZER 35
#define ECHO_PIN 23
#define TRIG_PIN 19
Servo servo4;
int fire;
void setup() {
  Serial.begin(115200);
  pinMode(BUZZER, OUTPUT);
  pinMode(Fire, INPUT);
pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  servo4.attach(16);
}
int i = 0;
float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}
void loop() {
fire = digitalRead(Fire);
if(fire == 0){
   tone(BUZZER,100);
   delay(1000);
 
    delay(1000);
}
else{
    noTone(BUZZER);
}
     


        float distance = readDistanceCM();

       
         if(distance < 100){               
          servo4.write(180);
         }
          if(distance > 100){
           servo4.write(0);
         }
         Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());

  
      
}