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

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

// #define TOKEN "rong4hgfdlksz4jig2oy"
#define TOKEN "v8gkiq6m2dyyjbt0gwse"

const char *mqtt_server = "thingsboard.cloud";

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

#define ADC_VREF_mV    3300.0 // in millivolt
#define ADC_RESOLUTION 4096.0
#define PIN_LM35       34

void setup() {
  Serial.begin(115200);
  
  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();

    // read the ADC value from the temperature sensor
  int adcVal = analogRead(PIN_LM35);
  // convert the ADC value to voltage in millivolt
  float milliVolt = adcVal * (ADC_VREF_mV / ADC_RESOLUTION);
  // convert the voltage to the temperature in °C
  float tempC = milliVolt / 10;
  // convert the °C to °F
  float tempF = tempC * 9 / 5 + 32;

    // print the temperature in the Serial Monitor:
  Serial.print("Temperature: ");
  Serial.print(tempC);   // print the temperature in °C
  Serial.print("°C");
  Serial.print("  ~  "); // separator between °C and °F
  Serial.print(tempF);   // print the temperature in °F
  Serial.println("°F");

  String payload = "{";
  payload += ",\"TemperatureC\":";
  payload += tempC;
  payload += ",\"TemperatureF\":";
  payload += tempF;
  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("7340c300-80a4-11ee-b952-7d878148e30b",TOKEN,""))
    if(client.connect("710a26f0-8133-11ee-9581-516a074efd38",TOKEN,""))
    {
      Serial.println(("Done"));
    }
    else
    {
      Serial.println("FAILED, retrying in 5 seconds");
      delay(5000);
    }
  }
}