@KM1967 Should not be a problem with adding M9 Plus to your Deco mesh of P7s. They are of the same Deco WiFi5 family, and M9 Plus has newer firmware than P7, meaning you should not be losing any...

@PauloAssumpcao Firmware 1.6.4 does not support IoT Network functionality. To have it on M9 Plus, you'll need to wait till TP-Link releases firmware 1.7.* or 1.8.* for M9 Plus V2. Under normal...

@RouterMess Usually, device such as printer can connect to WiFi using SSID/password combination. What type of printer requires MAC address to connect to WiFi? Can you give its brand and model number?...

@reizeltech Two of your Deco units, Hallway and Office, have firmware that does not support Connection Preference feature. Main Bedroom Deco runs on firmware that supports Connection Preference...

@PTX90 Many modern TVs that come with WiFi also have Ethernet port. If yours does, use it to connect TV to nearby X90 with Ethernet cable. For Tv streaming, wired link always preferred to WiFi.

@npapanik Make it simple: configure Deco mesh to run in Access Point mode and you can manage access to device through ISP Router configuration settings only, including DMZ if ISP Router supports it....