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

DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN=13;


char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient client;
unsigned long myChannelNumber =2255927;
const char * myWriteAPIkey = "ML3O3ML920FBR74E";

const int trig=12;
const int echo=13;

long distance;
long duration;

int statusCode;

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN,DHTesp::DHT22);
  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  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));
  Serial.println("****");
  delay(500);



  if(WiFi.status()!=WL_CONNECTED)
  {
    Serial.println("ATTENPTING TO CONNECT");
    while(WiFi.status()!=WL_CONNECTED)
    {
      WiFi.begin(ssid,pass);
      Serial.print(".");
      delay(5000);
    }
    Serial.println("\nConnected.");
  }

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

  data=dhtSensor.getTempAndHumidity();
  Serial.println("Temperature: "+String(data.temperature, 2) + "°C");
  Serial.println("Humidity: "+String(data.humidity, 1) + "%");
  Serial.println(".......");
  delay(1000);
}