Esp8266 keeps on online and offline

Hi everyone. Im working with a ultrasonic sensor as a water level sensor project. I want to get notification when the water level is high but when I connect to blynk, the esp8266 keeps on online and offline repeatly. I dont know what happened. Can anyone help me out? This is my codeā€¦


#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SPI.h>
#include <SimpleTimer.h>
#define trigPin 6
#define echoPin 7
#define led1 8
#define led2 9
#define led3 10
#define buzzer 11

char auth[] = "f*************************";
char ssid[] = "Meeting";
char pass[] = "***********";

SimpleTimer timer;


void sendSensor() {
  
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(buzzer, OUTPUT);

    

  if (distance >= 20)
  {
    digitalWrite(led1, HIGH);
    Blynk.notify("Water Level: Low");
    Serial.println("Water Level is low");
  }
  else
  {
    digitalWrite(led1, LOW);
  }


  if (distance < 20 && distance >= 10)
  {
    digitalWrite(led2, HIGH);
    Blynk.notify("Water Level: Medium");
    Serial.println("Water level is average");
  }
  else
  {
    digitalWrite(led2, LOW);
  }

  if (distance < 10 && distance >= 0)
  {
    digitalWrite(led3, HIGH);
    Blynk.notify("Alert! Water Level: HIGH!");
    Serial.println("Water level is high");
  }
  else
  {
    digitalWrite(led3, LOW);
  }

  if(distance <= 0)
  {
    Serial.println ("Out of range");
  }
  else
  {
    Serial.print(distance);
    Serial.println(" cm");
  }
}

void setup() {
  Serial.begin(9600);
  Blynk.begin(auth,ssid,pass);
  timer.setInterval(2500L, sendSensor);
  
}

void loop() {
 
  Blynk.run();
  timer.run();
}

2 posts were merged into an existing topic: Need help for push notification