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

const char* ssid = "YourWiFiSSID";
const char* password = "YourWiFiPassword";
const char* mqtt_server = "mqtt.wokwi.com";
const int mqtt_port = 1883;
const char* mqtt_user = "YourMQTTUsername";
const char* mqtt_password = "YourMQTTPassword";
const char* topic = "logistics/temperature";

WiFiClient espClient;
PubSubClient client(espClient);

const int temperaturePin = A0;

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

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

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ArduinoClient", mqtt_user, mqtt_password)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, mqtt_port);
}

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

  float temperature = analogRead(temperaturePin) * 0.48828125;
  Serial.print("Temperature: ");
  Serial.println(temperature);
  
  char msg[10];
  dtostrf(temperature, 4, 2, msg);
  client.publish(topic, msg);
  delay(5000); // Adjust the delay according to your needs
}