//Generated Date: Thu, 15 Feb 2024 06:54:54 GMT

#include <WiFi.h>
#include <PubSubClient.h>
#define MQTT_USER "thwen"
#define MQTT_PASSWORD "ABcd1234"

char _lwifi_ssid[] = "Wokwi-GUEST";
char _lwifi_pass[] = "";
const char* mqtt_server = "a35b4ce16fba4d36a541d81f8283f3b6.s1.eu.hivemq.cloud";
const unsigned int mqtt_port = 8883;
WiFiClient espClient;
PubSubClient mqtt_client(espClient);
String mqtt_data = "";

void mqtt_sendText(String topic, String text) {
    String clientId = "thwen";
    if (mqtt_client.connect(clientId.c_str(), MQTT_USER, MQTT_PASSWORD)) {
      mqtt_client.publish(topic.c_str(), text.c_str());
    }
    else{
      Serial.print("failed, rc = ");
      Serial.print(mqtt_client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
}

void reconnect() {
  while (!mqtt_client.connected()) {
    String mqtt_clientId = "thwen";
    if (mqtt_client.connect(mqtt_clientId.c_str(), MQTT_USER, MQTT_PASSWORD)) {
      Serial.println("MQTT OK");
  mqtt_client.subscribe("lhucin/ch01/temp");
    } else {
      Serial.print("failed, rc = ");
      Serial.print(mqtt_client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

char led = 0;

void setup()
{
  Serial.begin(9600);

  Serial.println("Wifi.....");
  WiFi.disconnect();
  WiFi.softAPdisconnect(true);
  WiFi.mode(WIFI_STA);
  WiFi.begin(_lwifi_ssid, _lwifi_pass);
  while (WiFi.status() != WL_CONNECTED) { delay(500); }
  delay(300);
  Serial.println("MQTT.....");
  randomSeed(micros());
  mqtt_client.setServer(mqtt_server,mqtt_port);
  mqtt_client.setCallback(callback);
  //mqtt_client.setBufferSize(1024);

}

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

void callback(char* topic, byte* payload, unsigned int length) {
  mqtt_data = "";
  for (int ci = 0; ci < length; ci++) {
    char c = payload[ci];
    mqtt_data+=c;
  }
  Serial.println((mqtt_data));
}