@Mau70 

1. To measure the signal strength, download a Wi-Fi analyzer on your phone. Make note of the MAC address of the units to know what network is what as you will see multiple instances of the network which can get confusing. The Deco will recommend what node to connect to and your devices will ultimately make the decision on what to connect to.

2. You don't, but I would like to test to see if the Wi-Fi speed is slower since the modem Wi-Fi would be interfering. Both can work, but they will work independently of each other, not as one single network.

3. If your Deco system runs fine, then look at the release notes of the update, if none are critical then you do not need to update. 

4. In the Deco app, tap on the globe icon, then on any Deco, which will tell you what is connected to what. 

@Tony  Thanks, I wll try all you suggest ! :)

@Mau70 

Hi

3) I would recommend to put your modem (router) on bridge mode.

In that case, Tp-link will be your main wi-fi and no need for modem. 


In my case, our ISP provided router with GPON and since TP-LINK can't use GPON, I use ISP router as bridge and Tp-link does everything, so just 1 wi-fi name for all wi-fi connections