void setup_wifi()
{
    // mode station
    WiFi.mode(WIFI_STA);
    Serial.println();
    Serial.print("Tentative de connexion à ");
    Serial.println(readconf.ssid);
    // Connexion Wifi
    WiFi.begin(readconf.ssid, readconf.password);
    while (WiFi.status() != WL_CONNECTED)
    {
        delay(5000);
        Serial.print(".");
    }
    // Affichage
    Serial.println("");
    Serial.println("Connexion Wifi ok");
    Serial.println("Adresse IP: ");
    Serial.println(WiFi.localIP());
    // Configuration mDNS
    WiFi.hostname(readconf.myhostname);
    if (!MDNS.begin(readconf.myhostname))
    {
        Serial.println("Erreur de configuration mDNS !");
    }
    else
    {
        Serial.println("Répondeur mDNS démarré");
        Serial.println(readconf.myhostname);
    }
}