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

const int DHT_PIN = 15;
const int LED_PIN = 13;
const char* WIFI_NAME = "Imane";
const char* WIFI_PASSWORD = "234234234234";
const char* MQTT_BROKER = "broker.hivemq.com"; 
const int MQTT_PORT = 1883;
const char* MQTT_TOPIC = "data/";

const int myChannelNumber = 2339746;
const char* myApiKey = "MO5PV9FKE9YHA2K6";
const char* server = "api.thingspeak.com";

DHTesp dhtSensor;
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT11);
  pinMode(LED_PIN, OUTPUT);
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Wifi not connected");
  }

  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);

  mqttClient.setServer(MQTT_BROKER, MQTT_PORT);

  ThingSpeak.begin(wifiClient);
}

void loop() {
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);

  if (data.temperature > 15 && data.humidity > 40) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);

  Serial.println("Temperature: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");

  if (mqttClient.connect("ESP32Client")) {
    mqttClient.publish(MQTT_TOPIC, String(data.temperature).c_str());
    mqttClient.publish(MQTT_TOPIC, String(data.humidity).c_str());
    mqttClient.disconnect();
    Serial.println("Data pushed to MQTT successfully");
  } else {
    Serial.println("MQTT connection failed");
  }

  if (x == 200) {
    Serial.println("Data pushed to ThingSpeak successfully");
  } else {
    Serial.println("ThingSpeak push error: " + String(x));
  }

  Serial.println("---");

  delay(10000);
}