@AmrTerra Wow, thank you for your comment. Apparently, I had the Access Control setting enabled also, which slow down the wifi speed by more than 250Mbps for no reason! But still, compared to other...

I have a TL-WPA7010 kit that works well. I want to add more units for more rooms, but now I can find only the TL-WPA7017. Can these kits communicate with each other?