// Check live data on https://thingspeak.mathworks.com/channels/2691707

#include <WiFi.h>           //Library for WiFi Functionality 
#include "ThingSpeak.h"     // Library for Thingspeak Specific Write read Functions
#include <DHT.h>             // Library for DHT Sensors

#define DHTPIN 21          // Pin where the DHT22 is connected
#define DHTTYPE DHT22      // Type of DHT sensor
DHT dht(DHTPIN, DHTTYPE);  //  Define DHT Library object as dht

const char* WIFI_NAME = "Wokwi-GUEST";  // Default Wokwi SSID - Dont Change
const char* WIFI_PASSWORD = "";         // Default Wokwi PASSWORD (Open Network) - Dont Change

const int myChannelNumber = 2691707;    // My channel Number
const char* myApiKey = "3H9VS434QR716KKV";  // Channel Write API Key
const char* server = "api.thingspeak.com";  // Server/host 

WiFiClient client;     // WiFi CLient object as client variable

void setup() {
  Serial.begin(115200);    // Serial Monitor 
  dht.begin();             // Init DHT Sensor
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);    //Connect to WiFi with given SSID and Pass
  delay(2000);                             // wait for wifi to connect
  while (WiFi.status() != WL_CONNECTED) {   // until wifi connected
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");   
  WiFi.mode(WIFI_STA);     // set wifi to be act in station mode
  ThingSpeak.begin(client);    // setup thingspeak with client
}

void loop() {
  float temperature = dht.readTemperature();  // Read temperature in Celsius
  float humidity = dht.readHumidity();       // Read humidity
  Serial.print("Temp: " + String(temperature, 2) + "°C  ");
  Serial.println("Humidity: " + String(humidity, 1) + "%");

  ThingSpeak.setField(1, temperature);   //add data in field 1
  ThingSpeak.setField(2, humidity);      //add data in field 2

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey); //Write to Thingspeak and save response in x

  if (x == 200) {
    Serial.println("Data pushed successfull");
  } else {
    Serial.println("Push error" + String(x));
  }
  Serial.println("---");

  delay(1000);     //Thingspeak Free account limit is 15sec. dont send before this time.
}