#include <WiFi.h>
#include <ThingSpeak.h>
WiFiClient client;
 long myChannelNumber = 2614309;
const char * myWriteAPIKey = "0XP58OLQ0HNT9G8Q";
int statusCode;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

int trig =12;
int echo =14;
float distance;
void setup() {

  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
   pinMode(echo ,INPUT);
   pinMode(trig , OUTPUT);
   pinMode(4, OUTPUT);
}

int ultraperformance(){
digitalWrite(trig , LOW);
delay(10);
digitalWrite(trig , HIGH);
delay(100);
digitalWrite(trig , LOW);

distance=pulseIn(echo, HIGH);
return(distance*0.034/2)+1;


}

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:
  delay(10); // this speeds up the simulation
}
  float actual_distance=ultraperformance();
  Serial.println(actual_distance);

  if (actual_distance>300){
    digitalWrite(4, HIGH);
  }
  else if(actual_distance>=200 && actual_distance <300 ){
     digitalWrite(4, HIGH);
  }
  else if(actual_distance>=0 && actual_distance<200 ){
     digitalWrite(4 ,LOW);
    
  }
  else{
         digitalWrite(4 , LOW);
         
  }
    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));
}

 

 
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}