@Thomas-Deco-M9P Deco M9 Plus firmware 1.2 is four years old. It is so old it does not have ability to be upgraded through Deco app. Instead of telling you it can't update M9 Plus firmware, Deco app...

@mamypoko Deco M9 Plus firmware 1.2 is four years old. It is so old it does not have ability to be upgraded through Deco app. Instead of telling you it can't update M9 Plus firmware, Deco app says...

@OneFromFL TP-Link states not to do that if Deco mesh runs in Router mode. Which is also what I told you: this configuration only works when Deco mesh runs in Access Point mode. I have three Deco,...

@Angstzaaier I, too, have M9 Plus in my Deco mesh. It is my Main Deco. I shared screenshot from M9 Plus with you. I run Deco mesh in AP mode. I may have an idea why you can't access M9 Plus Web...

@Angstzaaier You can check time settings on Main Deco. Open its IP address in a browser, login with same password you have for Deco app, navigate in the Main Deco Web page to system settings. Example:

@Generaltwig They provide you with WiFi mesh solution: this modem/router and two satellites run as WiFi mesh. I checked their specs: they are similar to Deco mesh. They are WiFi6 which is enough for...