Send WiFi stuff to Nextion display

Hi, I have no idea how to send Wifi.SSID WiFI.MAC, WiFi.IP to Nextion display. There is no problem with sending it to Nextion, I use Perry's way or library, it works, but how to convert this to form which understand Nextion.
I know only how to send Wifi.RSSI

char wifi[25];
sprintf(wifi, "%3d", WiFi.RSSI());
sila_signalu.setText(wifi);

SSID, MAC and IP don't work in this way. Thank a lot

@Lubochr, please do not hijack. Thread split from here.

Thanks, I know about article from link. But I'm not able to do nothing with this. Article finished with same result as my, it doesn't work. There it isn't solved.