@David-TP Thanks for your response. My topology is really simple : ISP router box(Wi-Fi 1 enabled)--------cable------------Deco M4 (AP mode and wifi 2 provider). Yes I took your words . Each one is...

@David-TP Thanks for your reaction. Indeed, I've 2 wifi, like you mentionned. The tp'link's one is created from the installation of the m4. But I just wanted my orginal wifi with an AP. If I delete...

After configuration in AP mode, there are two wifi networks remaining. I only want one but it must cast from the router and the AP. They stand each at THE good place. I cannot have wifi in my entire...