@EvilDoctorK Yes, that gets confusing. Bring back Zyxel switch to its original place, unplug everything from it but the link to TL-SG1008D. Also, unplug every device from patch panel connected to...

@Kossie I used to have Deco M9 Plus. I have gigabit Internet. On desktop PC wired to second Ethernet port of Main Deco I had 950Mbps. On smartphone wirelessly connected to Main Deco I have seen...

@Marcos_K You can connect Deco X1500 through TP-Link powerline adapters (their Ethernet port). I suggest to check wired speed over powerline link: if you are getting less than 200Mbps over powerline...

@Bandyrobs You need wired link to make it work, if powerline is not stable and coax/Ethernet is not an option, you may be out of luck. You can mix X50s and M4s, but that will not improve anything....

@EvilDoctorK Another test: bring both the 'Garden' node and TL-SG1008D into the house, connect TL-SG1008D to Zyxel switch, connect "Garden' node to TL-SG1008D. If Ethernet backhaul is stable, the...

Bandyrobs wrote I have been using our DECO M4 mesh (3 devices) in a previous house for a few years without issue. Have just moved to a 300 year old stone cottage with thick walls. Generally the mesh...