Hi @JORGESS As I read from the app store, google play and the TP-LINK website, TL-WA830RE is not compatible with Tether APP.

Bad luck, my friend : ( Contact the shop to see if they can offer replacement

What is the distance between the 5210 and 7210? It is a bad idea to use directional AP to repeat wireless network and you probably won't get good results. But you do need to do this, here is the...

Unfortunately standard IEEE802.3af style PoE injectors generate voltages up to 48V and regarding the datasheet the CPE510 accepts 24V only! This is still not the point. The point is TP-LINK and UBNT...

I am using TL-ER6120 as a internet gateway for my office. It is stable enough for my 20 colleagues with about 30 devices. What particular function do you refer to by mentioning "QoS"?

Unfortunately I think it is probably broken by the power fail as you described.