ESP32-WiFi-MQTT-Publish

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

const char* ssid = "ssid";
const char* password = "password";

const char* mqtt_server = "ip-adressen-til-mqtt";

WiFiClient espClient;
PubSubClient client(espClient);

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

  client.setServer(mqtt_server, 1883);
}

void loop() {
  // Sender value til topic/topic og venter 10 sek.
  client.publish("topic/topic", "value");
  delay(10000);
}