@Gerco Hello, I agree with you that the ethernet connection is more stable than wireless connection; The Deco units can connect to each other by wired cable or wireless to build up the mesh network...

@Gman4444 Hello, you can check the local website whether the single unit is available. And you can contact our sales department to get some help. https://www.tp-link.com/support/download/deco-p9/...

@RedRoger Yes, both Deco and EAP225-outdoor supports mesh feature, you can use the outdoor access point to boost wifi signal but they cannot build up the same network together. Good day.

@SnaffyNoo You are welcome, glad to help you. If need more help in the future, be free to let us know. Good day.

@MwV Hello, this feature is not available now, but we have noticed that and have forwarded to our product department. They are working on it now. You can keep an eye on official website or Deco app...

@Bricefa Okay, sure. Any updates, be free to let us know. Best regards.