#include <WiFi.h>
#include <ThingSpeak.h>
#include <DHTesp.h>
DHTesp dhtSensor;
TempAndHumidity data;
int trig=13;//me
int echo=12;
float dist,dist1;
const int DHT_PIN = 15; //always use 15
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2610837;
const char * myWriteAPIKey = "JAZF3PMYX77KI97B";
int statusCode;
int num=1;
void setup() {
Serial.begin(115200);
pinMode(echo, INPUT);                    //me
pinMode(trig, OUTPUT);                   //me
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}
long distance()                           //me 
{
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  dist=pulseIn(echo,HIGH);  
  dist1=dist*0.034/2;
  return dist1;  
}                                    //me
void loop() {
data = dhtSensor.getTempAndHumidity();
  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.");
  }
Serial.println("-----------");
Serial.println("Humidity=> " + String(data.humidity, 1));
Serial.println("Temperature=> " + String(data.temperature, 2));
Serial.println("No.of times updated=>"+String(num));
Serial.print("Distance=>");                     //me
Serial.println(dist1);                        //me
Serial.println("-----------");
num+=1;

ThingSpeak.setField(1, data.humidity);          //me
ThingSpeak.setField(2, data.temperature);
ThingSpeak.setField(3, distance());           //me

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));
}
delay(15000);
}