#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=  2236027;
const char * myWriteAPIKey="Y2445WNHS4Q35TG1"; 
const int trig = 12;
const int echo = 14;

long duration;
long distance;
//float distance;

int statusCode;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  Serial.begin(115200);
  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("---");
  delay(1000);
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  
  duration = pulseIn(echo, HIGH);
  //serial println(duration);
  distance = (duration * 0.034/2) + 1;
  Serial.println(" Distance " + String (distance));
  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.");
  }
  ThingSpeak.setField(1,data.temperature);
  ThingSpeak.setField(2,data.humidity);
  ThingSpeak.setField(3,distance);
  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
  
  if(statusCode == 200)
  {
    Serial.println("Channel update succesfully");
  }
  else{
    Serial.println("Problem Writing data.HTTP error code :" + String(statusCode));
  }
  delay(15000);
}