@Kevin_Z Hi, thank you for replay and for forwarding my case. The stove module is TECH ST-5060 [https://sterownikitech.pl/sterownik-stalmark-modul-wifi-rs-st-5060,id771.html] If I can send any more...

@Kevin_Z Hi, as I wrote upper I disabled smart connect option and unfortunately stove module lost connection to Internet also on main 2,4 GHz network. So I made hotspot from my smartphone and...

@Kevin_Z Okay, so I did what below: Disable Smart Connect option For 2,4GHz network I set WPA/WPA2 Personal security (WPA2/WPA3 for 5GHz network) I have done connection stove module to main 2,4GHz...

@Kevin_Z Okay, I understand. I try implement your suggestion. I tried to connect another device to guest network. That was old smartphone and it worked fine. It looks like after last fw update router...

@Kevin_Z But Smart Connect option I have active only for main WiFi network while Guest network I have only 2,4GHz active. Stove module works only on 2,4GHz.

@Kevin_Z Hi, thank you for replying :) Well, heating stove module shows that it's connected to wifi network but no internet connection and there is no module on clients list after logging to ax20...