#include <WiFi.h>
#include <ThingSpeak.h>
char ssid []="wokwi-GUEST";
char pass []="";

unsigned long mychannelNumber =2634636;
const char*myWriteAPIKey ="EEOHPZOWDQ8AJIIV";
const char*server = "api.thingspeak.com";

const int trig=12;
const int echo=27;
long  duration;
int  distance;

WiFiClient client;

void setup() {
  Serial.begin(115200);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);

  WiFi.begin(ssid,pass);
  Serial.println("connecting to WiFi...");
  while (WiFi.status() !=WL_CONNECTED){
    Serial.println(".");
  }
  Serial.println("connected!");

  ThingSpeak.begin(client);
}

void loop() {

  digitalWrite(trig, LOW);
  delay(1000);
  digitalWrite(trig, HIGH);
  delay(1000);
  digitalRead(trig, LOW);
delay(1000);
  duraction = pulseIn(echo,INPUT);

  int c= (distance*0.034/2);
  Serial.println(c);
  delay(1000);

  ThingSpeak.setField(1,distance);
  int x = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(x ==200){
    Serial.println("Data successfully sent to ThingSpeak");
  }
  else{
    Serial.println("Problem sending data. HTTP error code" + String(x));
    delay(1000);
  }
}