const int trig = 2;
const int echo = 4;

long duration; 
long distance;
int statusCode;
#include <WiFi.h>
#include <ThingSpeak.h>
#include "DHTesp.h" 
DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN = 15;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber =  2251371;
const char * myWriteAPIKey = "S1KPJP2WTDJGV1CQ" ;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
   dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
    pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

}

void loop() {
   data = dhtSensor.getTempAndHumidity();
  Serial.println("Temperature: "+ String(data.temperature, 2)+" °C");
  Serial.println("Humidity: "+ String(data.humidity, 1)+"%");
  Serial.println("---");
   digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  duration = pulseIn(echo, HIGH);
  distance = (duration * 0.034/2) + 1;
  Serial.println("Distance" + String (distance));
  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
  if(WiFi.status() != WL_CONNECTED)
  {
    Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
      WiFi.begin(ssid, pass);
      Serial.println(".");
      delay(5000);
    }
    Serial.println("\nConnected.");
  }
 ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(1,data.humidity);
 ThingSpeak.setField(3, 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);
}