#include <Arduino.h>
/* -------------------------------------
    Praxis 21
    Nutzung des MQTT-Brokers 
    Temperatur und Luftfeuchtigkeit
    publishen
  -----------------------------------*/

#include <WiFi.h>
#include <MQTT.h>
#include <DHT.h>
#define DHT_SENSOR_PIN 26      // ESP32 Pin GIOP26 führt zu DHT11 Sensor
#define DHT_SENSOR_TYPE DHT11  // Es ist ein DHT11

DHT dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);

const char* ssid = "Labornetz";
const char* password = "ITLabor2024!";
const char* mqtt_server = "172.24.100.10";
const int mqtt_port = 1883;
const char* mqtt_user = "";
const char* mqtt_password = "";
const char* client_name = "ESP32Clientxxxx";

WiFiClient net;
MQTTClient client;

void connect() {
  WiFi.begin(ssid, password);
  Serial.print("Verbinde mit WLAN...");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }
  Serial.print("\nVerbinde mit MQTT-Broker...");
  client.begin(mqtt_server, mqtt_port, net);
  while (!client.connect(client_name, mqtt_user, mqtt_password)) {
    Serial.print(".");
    delay(1000);
  }
  Serial.println("\nVerbunden!");
}

void setup() {
  Serial.begin(115200);
  delay(1000);
  connect();  
  dht_sensor.begin();
}

void loop() {
  if (!client.connected()) {
    connect();
  }
  float humi = dht_sensor.readHumidity();
  float tempC = dht_sensor.readTemperature();
  if ( isnan(tempC) || isnan(humi)) {
    Serial.println("Fehler beim Lesen des Sensors!");
  } else {
    Serial.print("Feuchtigkeit: ");
    Serial.print(humi);
    Serial.print("% | Temperatur: ");
    Serial.print(tempC);
    Serial.println("°C ");
    char tempString[8];
    dtostrf(tempC, 1, 2, tempString);
    char humString[8];
    dtostrf(humi, 1, 2, humString);
    client.publish("esp32nxxxx/temp", tempString);
    client.publish("esp32nxxxx/humi", humString);
  }
  delay(5000);
}