#include <WiFi.h>
#include<ThingSpeak.h>

char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;

unsigned long mychannelNumber=2603645;
const char* myWriteAPIkey="Z0SSPHJOJ9WSG5DW";
int statusCode;

void setup() {
  Serial.begin(115200);
  pinMode(13, OUTPUT);
  pinMode(14,INPUT);

  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  delay(1000);
}

void getwifi()
{
  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");
}

  void loop() {
    getwifi();
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  float duration = pulseIn(14,HIGH);
  int distance = (duration*0.034)/2;
  Serial.println(distance);

  ThingSpeak.setField(1,distance);


  statusCode = ThingSpeak.writeFields(mychannelNumber,myWriteAPIkey);
  if(statusCode==200)
  {
    Serial.println("channel update successful");
  }
  else
  {
    Serial.println("problem Writing data:HTTp error code:"+String(statusCode));
    }
    delay(15000);
}