@ZoloN With GA firmware 1.6 this can be found under Advanced in Deco app: It is possible that in beta firmware it is hardcoded. Try to reproduce the issue to check that. If Smart DHCP is now...

ZoloN wrote @Alexandre. As an IT-Pro I would like try to find the root cause - installing beta firmware should be the last solution. IMHO my issue isn't in status "known issue", as when I tried to...

@Vanellus Asking TP-Link Support to comment on that: @David-TP

@Dany1 HP OfficeJet Pro 8720 All-in-One Printer has Ethernet port. Connect it with Ethernet cable to one of Satellite Deco and see if printer will get a connection through wired link.

@BigKevOz Any unmanaged gigabit switch from TP-Link should do, but just in case - get it from the place with return policy of at least 1-2 weeks.

@Vanellus Thanks. Everything looks in order. You should be having signal selection capability with firmware 1.6, not sure what is going on. Just in case, power off all your Deco units and then after...