I bought TP-Link Deco M4 Device (3 devices) and i'm using them with router mode. I've some of problems with them. First of all i'm so sorry for my bad english :) My problems;
1. I have Cat6 network cable at all rooms and connected to the ISP router modem. That's why my deco m4 devices connected via cable to the isp modem. Problem is that, if 3 devices connected via cable, wifi connectios has been disconnecting continuous. if i unplug the network cable from one devices it's ok (2 devices connected via cable + 1 device connected wifi) What can be problem? I'm using with router mode. I want to use all devices via network cable but for now it's not possible for me with 3 devices.
2. If i try to use them via "Access point mode" my clients can not get an ip address from deco devices. I see 169.... ip adress on the clients. Some times can get ip and lost again a few second later. My main isp modem can not use via bridge mode. Normally my connected devices should get an ip from my isp modem? Why deco devices can not as access point without problems? I can use as router mode but access point mode can not work for me.