#include <DHTesp.h>

//wifi and thingspeak library include
#include <WiFi.h>
#include <ThingSpeak.h>
// Thingspeak connectivity variable Declaration
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2605671;
const char * myWriteAPIKey = "638QUDNKO9KO8O54";
int statusCode;
DHTesp dht;
TempAndHumidity data;

void setup() {
  Serial.begin(115200);

  //wifi and thingspeak mode setup
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  pinMode(14, OUTPUT);
  pinMode(26, INPUT);
dht.setup(26,DHTesp::DHT22);
}
void loop() {
  //wifi connection setup
   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.");
  }
  data = dht.getTempAndHumidity();
  Serial.println("Temperature");
  Serial.println(data.temperature);
  Serial.println("Humidity");
  Serial.println(data.humidity);
  delay(1000);
  digitalWrite(14, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
  float duration =pulseIn(26,HIGH);
  int distance = duration *0.034/2;
  Serial.println(distance);

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

  //Thingspeak response
  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);

}