//-----------------------------------------------------
//2024 (C)(R) All Rights Reserved Constantinos Challoumis
//This program produces random numbers of temperature
//and humidity. Also, there is a DHT22 for the control
//of the temperature and humidity. The data extracted via server to
//node-red.
//-----------------------------------------------------
#include <WiFi.h>
#include <PubSubClient.h>
#include "DHTesp.h"
#include <DHT.h>


const int DHT_PIN = 9;

DHTesp dhtSensor;

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE  (50)
float temp = 0;
float hum = 0;
int value = 0;

char msg1[100];
char msg2[100];
float randNumber1; // random number
float randNumber2; // random number
float temperature1;
float humidity1;

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == '1') {
    digitalWrite(2, LOW);   // Turn the LED on (Note that LOW is the voltage level
    // but actually the LED is on; this is because
    // it is active low on the ESP-01)
  } else {
    digitalWrite(2, HIGH);  // Turn the LED off by making the voltage HIGH
  }

}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected");
      // Once connected, publish an announcement...
      client.publish("iotfrontier/mqtt", "iotfrontier");
      // ... and resubscribe
      client.subscribe("iotfrontier/mqtt");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

#define DHT_PIN 9

// Uncomment the following line for DHT11
// DHT dht(DHT_PIN, DHT11);

// Comment out the above line and uncomment the following line for DHT22
DHT dht(DHT_PIN, DHT22);

void setup() {
  pinMode(2, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {

  if (!client.connected()) {
    reconnect();
  }
  client.loop();

   

  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    
    /*TempAndHumidity data = dhtSensor.getTempAndHumidity();
   
    String temp = String(data.temperature, 2);
    Serial.print("Temperature (C): ");
    Serial.println(temp);
    client.publish("iotfrontier/temperature", temp.c_str());
    
    String hum = String(data.humidity, 2);
    Serial.print("Humidity (%): ");
    Serial.println(hum);
    client.publish("iotfrontier/humidity", hum.c_str());*/

    randNumber1 = random(-20,70)*1;
    randNumber2 = random(0,100)*1;

    String msg1 = String(randNumber1, 2);
    Serial.print("Temperature dynamic (C): ");
    Serial.println(msg1);
    client.publish("iotfrontier/temperature1", msg1.c_str());
    
    String msg2 = String(randNumber2, 2);
    Serial.print("Humidity dynamic (%): ");
    Serial.println(msg2);
    client.publish("iotfrontier/humidity1", msg2.c_str());
    delay(1000);

    delay(1000);  // Wait for 1 seconds between readings

  float temperature = dht.readTemperature();  // Read temperature in Celsius
  float humidity = dht.readHumidity();        // Read humidity

  // Check if any reads failed and print the results to the serial monitor
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
  } /*else {
    Serial.print("Temperature (C): ");
    Serial.print(temperature);
    Serial.print("Humidity (%): ");
    Serial.print(humidity);
    Serial.println(" %");
  }*/

  String temp = String(temperature, 2);
    Serial.print("Temperature (C): ");
    Serial.println(temp);
    client.publish("iotfrontier/temperature", temp.c_str());
    
    String hum = String(humidity, 2);
    Serial.print("Humidity (%): ");
    Serial.println(hum);
    client.publish("iotfrontier/humidity", hum.c_str());

  }
}



void loop1() {
  
}
  // Initialize min and max values
  //int minVal = -20;
  //int maxVal = 70;
  //int randomNumber;

  // Perform the task for 20 iterations
  //for (int i = 0; i < 100; i++) {
    // Generate a random number within the current min and max limits
   // int randomNumber = random(minVal, maxVal);

    // Print the randomly generated number on the serial monitor
   // Serial.println(randomNumber);

    // Update min and max values for the next iteration
   //  randomNumber = random(minVal, maxVal);

    // Add a delay for better readability (optional)
   // delay(500);
 // }

  // End the program after 20 iterations
//  while (true) {
 //   delay(1000);
 // }
 // Serial.print("Humidity1 (%): ");
  //  Serial.println(randomNumber);
  //  client.publish("iotfrontier/humidity1", randomNumber);
 //   delay(1000);

  //client.loop();

  //randNumber1 = random(-20,70);
    //randNumber2 = random(0,100);

  //sprintf(msg1, " %i ", randNumber1);
  //sprintf(msg2, " %i ", randNumber2);
  //client.publish("iotfrontier/temperature1", msg1);
  //client.publish("iotfrontier/humidity1", msg2);
  //Serial.println(msg1);
    //Serial.println(msg2);
  //delay(1000);