@FredsterNL If you get a good enough connection as D-C said above, you can further help it run more stable with a few tweaks on your omada switches Plug in the powerline adaptors, and link them to...

@Giang97 Custom Echo Server has been an option for years on both standalone and controller modes. I have tested it and it does work as the Onloine Detection check to whatever IP you put int there

@Walri01 No need to repalce it, ER605 has no issues with DHCP. Its either an old firmwre bug or a misconfiguration

@MrAlab OC always comes after software build, so yes

@farog_basher You can use the interference and WiFi optimisation tools in the controller but it only gets you so far. If you have a high density of access points, you might need to manually tune...

@Walri01 Your hardware and software version is confusing in the OP If you have a ER605 v1, it firmware started at v1 If you have a ER605 v2, its firmware started at v2.0.0 Which do you actually have?...