Dex and Smartview cannot connect to my Sony Android TV via WiFi

[rcpffm]

Dex and Smartview cannot connect to my Sony Android TV KD-55XF8505 via WiFi

I get 

WiFi-Gerät angeschlossen

but the WLAN Connection fails

though the TV is in the WLAN, and the same as the Note20 is. 

Other mobiles, e. g.  Note8 and Xiaomi Note 8 Plus can connect via Smartview. 

They do not supply DeX though to test. 

[suntzu30]

you've got the same problem as me most likely, I have a Phillips android TV and they use the chrome cast method rather than mira cast. Dex is only compatible with Mira Cast

[GreyMatter]

check if your tv uses chromecast instead of Mira Cast. Samsung uses the miracast method and the two types ate not compatible