@VisLock Other that yellow dot, there is something else wrong with your M9/M5 Deco mesh. Here is how I see that screen with my M9/M5 Deco mesh: There are clients connected to Satellite Deco, and I...

@Yopejjepi Judging from your screenshot, you have M3W as Satellite Deco. That Deco model has very old firmware, which does not show devices connected to it. In Deco app, these devices will be shown...

@ErnstSl Could be both Ethernet cables with problems, could be hardware issue with second port of Main Deco. You'll need to run few more tests to narrow the issue. You run Deco mesh in AP mode, so...

@Richchad I can't tell for sure if Netgear powerline adapter will be compatible with Deco mesh, but you can test it when you have Deco units. If it is 12 years old and not compatible, maybe it is...

Alex251187 wrote @Alexandre. I dont know much about switches... I found these 2 would either/both work and could you say the difference (one is much nicer to look at!) TL-SG105S TL-SG1005D Please let...

@Richchad TP-Link also sells Deco X50 and X55 in 2-unit sets. If you need 4 units, buy two 2-unit sets. I would recommend X50 or X55, they have better feature set than X20. All Deco models will work...