#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <ThingSpeak.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";  
WiFiClient client;
long myChannelNumber = 2687772;
const char * myWriteAPIKey = "HJRMHUS1F86HANO4";
int statusCode;
LiquidCrystal_I2C lcd1(0x27, 16, 2);





int trigger=19;
int echo=18;
int light=13;
int buzzer=15;                       

void setup(){
  // put your setup code here, to run once:
   ThingSpeak.begin(client);
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
 // initialize LCD
  lcd1.init();
 // turn on LCD backlight 
  lcd1.backlight();

// set cursor of first colum,first row
lcd1.setCursor(0,0);
//print messsage
lcd1.println("water condition");
delay(1000);

 




delay(100);

  Serial.begin(115200);
 
 pinMode(trigger, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(light, OUTPUT);
 pinMode(buzzer, OUTPUT);
}

int Ultra_sonic(){
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
 float recieved= pulseIn(echo, HIGH);
 float converted=(recieved*0.034/2)+1;
 return(converted);
delay(1000);
}

void loop() {
  

    if(WiFi.status() != WL_CONNECTED)  
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 
    // put your main code here, to run repeatedly:
  int actual_distance=Ultra_sonic();
  Serial.println(actual_distance);
  delay(100);
  
 lcd1.clear();
  if(actual_distance<=250){
    digitalWrite(light, HIGH);
    tone(buzzer,5000);
   
    lcd1.setCursor(0,0);
    lcd1.println("water level incresd");
    lcd1.setCursor(0,1);
    lcd1.println("goto safe area");
    delay(1000);
     lcd1.clear();
  }
    else if(actual_distance>250){
      digitalWrite(light, LOW);
      noTone(buzzer);
       lcd1.setCursor(0,1);
      lcd1.println("Safe Condition");
     delay(1000);
      lcd1.clear();
    }
    ThingSpeak.setField(1,actual_distance);

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));

  
  }
   }