Do you still keep the package of the adapter? You may check the HW version on the package. how about the link negotiation speed on the computer when you are using T4U? Have you also tried on other...

Try to press reset button for 15s to hard reset it. Or can you login to the web UI? If yes, you may login to the web UI to reset it.

hey, we can't make it on a smart phone. Firstly, we can't install the printer's driver on your phone. Seconldy, we can't set standard TCP/IP port on your smart phone. We can only share this on PC...

Now, can you still login to the web UI of the routers? What's the current FW of them? you may refer to the following link to update the FW: https://www.tp-link.com/us/faq-1388.html Certainly, you may...

So far, Deco M5 does NOT support WPS function. TP-link will improve it to support soon. There is no other way to connect the wifi on your camera? Generally speaking, there is web UI to guide you...

how about power off and on the router? if you do not change the default login password, does everything go well? besides, try to set it up via a cable connection.