#define BLYNK_TEMPLATE_ID "TMPL3tobBFjj-"
#define BLYNK_TEMPLATE_NAME "IOT FLOOD MONITORING"
#define BLYNK_AUTH_TOKEN "gy2bzR-i-RbPW3oWOpAiDgr6sSVzIHVZ"

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define BLYNK_PRINT Serial 
#include <WiFi.h>  
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>
Servo gate;
const int trigPin=2;//d2
const int echoPin=4;//d4
const int servoPin = 18;//d18
long duration;
int distance;

void setup() {
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
   pinMode(trigPin, OUTPUT);
   pinMode(echoPin, INPUT);
   gate.attach(servoPin, 500, 2400);
}

void loop() 
{
 digitalWrite(trigPin, LOW);
 delay(2);
 digitalWrite(trigPin,HIGH);
 delay(10);
 digitalWrite(trigPin, LOW);
  
  
 duration=pulseIn(echoPin,HIGH);
 distance=duration*0.034/2;
 Serial.println(distance);
 Blynk.virtualWrite(V0,distance);


if(distance<50)
{
  gate.write(90);
 Blynk.virtualWrite(V1,"FLOOD DETECTED GATES OPENED");
}
else
{
  gate.write(0);
Blynk.virtualWrite(V1,"SAFE CONDITIONS GATES CLOSED");
}


}