// Example testing sketch for various DHT humidity/temperature sensors written by ladyada
// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

#include <DHT.h>
#include <WiFi.h>
#include <PubSubClient.h>

#define DHTPIN 4     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);

//Wifi credential

const char *ssid="Wokwi-GUEST";
const char *password = "";

#define TOKEN "eKbdYrzGwOw3zOP2uo7Y"
//const char *mqtt_server = "thingsboard.cloud";
const char *mqtt_server = "demo.thingsboard.io";

WiFiClient wifiClient;
PubSubClient client(wifiClient);
int status = WL_IDLE_STATUS;


void setup() {
  Serial.begin(115200);
  Serial.println(F("DHTxx test!"));
  dht.begin();
  Serial.println("connect to : ");
  Serial.println(ssid);
  WiFi.begin(ssid,password);
  while(WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.println("... ");
  }
  Serial.println("\n");
  Serial.println("IP Address : ");
  Serial.println(WiFi.localIP());
  Serial.println("\n");
  Serial.println("connect to : ");
  Serial.println(ssid);
  client.setServer(mqtt_server,1883);
}

void loop() {
  // Wait a few seconds between measurements.
  if(!client.connected()) reconnect();
  

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));

  String payload = "{";
  payload += "\"Humidity\":";
  payload += h;
  payload += ",\"TemperatureC\":";
  payload += t;
  payload += ",\"TemperatureF\":";
  payload += f;
  payload += ",\"HeatIndexC\":";
  payload += hic;
  payload += ",\"HeatIndexF\":";
  payload += hif;
  payload += "}";
  Serial.println(payload);
  char attributes[1000];
  payload.toCharArray(attributes,1000);
  client.publish("v1/devices/me/telemetry",attributes);
  client.publish("v1/devices/me/attributes",attributes);
  Serial.println(attributes);
  delay(5000);

  
  
}

void reconnect()
{
  while(!client.connected())
  {
    status = WiFi.status();
    if(status != WL_CONNECTED)
    {
      WiFi.begin(ssid,password);
      while(WiFi.status() != WL_CONNECTED)
      {
        delay(500);
        Serial.println(". ");
      }
      Serial.println("Connected to AP");
    }
    Serial.println("Connecting to thingsboard node ..."    );
    if(client.connect("ea2c58a0-6dbf-11ee-9d7d-a533898c4c2a",TOKEN,""))
    {
      Serial.println(("Done"));
    }
    else
    {
      Serial.println("FAILED, retrying in 5 seconds");
      delay(5000);
    }
  }
}