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

// DHTesp
DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN = 15;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient Client;
unsigned long myChannelNumber = 2067868;
const char * myWriteAPIKey = "VTXK0UMAARJ8992E";

//ultrasonic

const int trig = 2;
const int echo = 4;
long duration;
long distance;
 
int statusCode;

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

void loop() {
  if(WiFi.status() != WL_CONNECTED)
   {
     Serial.println("Attempting to connect");
     while(WiFi.status() != WL_CONNECTED)
     {
       WiFi.begin(ssid, pass);
       Serial.println(".");
       delay(5000);
     }
     Serial.println("\nConnected.");
   }

  // DHTesp
  data = dhtSensor.getTempAndHumidity();
  Serial.println("Humi: " + String(data.humidity));
  Serial.println("Temp: " + String(data.temperature));
  Serial.println("---------");
  delay(1000); // this speeds

  //ULTRASONIC
  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));
  Serial.println("**********************");
  delay(1000);

   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);
 
}