protected function buildWifiString()
    {
        $wifi = $this->prefix;

        if (isset($this->encryption)) {
            $wifi .= 'T:'.$this->encryption.$this->separator;
        }
        if (isset($this->ssid)) {
            $wifi .= 'S:'.$this->ssid.$this->separator;
        }
        if (isset($this->password)) {
            $wifi .= 'P:'.$this->password.$this->separator;
        }
        if (isset($this->hidden)) {
            $wifi .= 'H:'.$this->hidden.$this->separator;
        }

        return $wifi;
    }