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

const int tem=15;

const int tri = 2;
const int echo = 4;
float duration;
long dis;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2117951;
const char*myWriteAPIKey = "CDMLLZA8CO8A3ZVJ"; 
int statusCode;

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

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

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.");
  }

  dis = getdistance();
  Serial.println("Distance: "+String(dis));
  delay(10);
   Serial.println("__________________");
  delay(1000);

  ThingSpeak.setField(1,String(dis));
  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode == 200){
    Serial.println("channel updated");
  } else {
    Serial.println("problem in updating");
    String(statusCode);
  }
  delay(15000);
}

long getdistance() {
  digitalWrite(tri, LOW);
  delayMicroseconds(2);
  digitalWrite(tri, HIGH);
  delay(10);
  digitalWrite(tri, LOW);
  duration = pulseIn(echo,HIGH);
  return ((duration*0.034/2)+1);
}