#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 = 2446523;
const char * myWriteAPIKey = "HLTIWLU9LUSTW461";

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

long duration;
long distance;

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) + " cm");
  delayMicroseconds(1);

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

  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 Successful.");
  }
  else{
    Serial.println("Problem Writing data. HTTP error code: " + String(statusCode));
  }
  delay(1000);

}