@woozle I have tested several different combinations. Mac mini to iPhone. PC (Win10) to iPhone. Mac mini to PC (Win10) and Mac mini to TP-Link HS200 smart swith. All have the same problem. No problem...

Two devices cannot ping each other through WiFi. I have tried to enable/disable the AP isolation option in Advanced -> Wireless -> Additional Seatings and it makes no difference. The operation mode...