#include <Arduino.h>
#include "DHT_Async.h"
#include <WiFi.h>
#include "ThingSpeak.h"

#define DHT_SENSOR_TYPE DHT_TYPE_22
static const int DHT_SENSOR_PIN = 32;
DHT_Async dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);

const char* ssid = "Wokwi-GUEST";   // Write your SSID
const char* password = ""; // Write your WIFI password

WiFiClient  client;
unsigned long Channel_ID = 3308053;  	     //replace with your Channel ID
const char * API_key = "28K22LIY7EGRU9S1"; //replace with your API Key

static bool measure_environment(float *temperature, float *humidity) 
{ static unsigned long measurement_timestamp = millis();

  /* Measure once every four seconds. */
  if (millis() - measurement_timestamp > 4000ul) 
  { if (dht_sensor.measure(temperature, humidity)) 
      { measurement_timestamp = millis();
        return (true);
      }
  }
  return (false);
}

void setup() 
{ Serial.begin(9600);  
  WiFi.mode(WIFI_STA);   
  ThingSpeak.begin(client);  // Initialize ThingSpeak

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




void loop()
{ static float temperature = 0.0;
  static float humidity = 0.0;
  static unsigned long lastThingSpeakTime = 0;
  int an;

  // Read DHT sensor every 4 seconds
  if (measure_environment(&temperature, &humidity))
  { Serial.print("T = ");
    Serial.print(temperature, 1);
    Serial.print(" deg. C, H = ");
    Serial.print(humidity, 1);
    Serial.print("%  ");

    an = analogRead(33);
    Serial.print("Analog = ");
    Serial.println(an);
  }

  // Send data to ThingSpeak every 20 seconds
  if (millis() - lastThingSpeakTime >= 20000UL)
  { ThingSpeak.setField(1, temperature);
    ThingSpeak.setField(2, humidity);
    ThingSpeak.setField(3, an);

		
		int Data = ThingSpeak.writeFields(Channel_ID, API_key);

    if (Data == 200)
      Serial.println("Channel updated successfully!");
    else
      Serial.println("Problem updating channel. HTTP error code " + String(Data));

    lastThingSpeakTime = millis();
  }
}