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

const char* ssid = "Wokwi-GUEST";
const char* pass = "";
const char* mqtt = "test.mosquitto.org";

int red = 4;
int green = 2;
int blue = 15;

WiFiClient espClient;
PubSubClient client(espClient);

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

  //PinModes
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);

  //WiFi Connection
  Serial.println("");
  Serial.print("Connecting to: ");
  Serial.print(ssid);

  //Check if WiFi is connected and load
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    }
    //Show connection done and IP
    Serial.println("");
    Serial.print("WiFi Connected, IP: ");
    Serial.print(WiFi.localIP());

    //MQTT Connection
    client.setServer(mqtt,1883);
  }



void loop() {
  //check if connected to MQTT Server
  if (!client.connected()) {
    reconnect();
  }
  client.loop(); 

}

void reconnect() {
  while (!client.connected()) {
    Serial.println("MQTT not connected......Trying to connect.");

    //Create client ID

    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);

    //Attempt Connection
    if (client.connect(clientId.c_str())) {
      Serial.println("Connected!");
    }
      else {
        Serial.println("Failed, response code=");
        Serial.print(client.state());
        delay(5000);
      }
    }
  }