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

unsigned long myChannelNumber = 2622906;
const char* myWriteAPIKey = "V8T1IJ8G5IHDEY0M";
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.print("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);
  digitalWrite(trig, LOW);
delay(1000);
  duration = 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);
  }
}