@MamaSylvia 

There is a SETUP Guide, should be with the unit.

If not, it is here, https://static.tp-link.com/2019/201902/20190203/7106508201_TL-WR902AC(EU%20US)_QIG_V1.pdf

It shows how to connect to both situations you have,  Existing Router or a Hotspot.

Have a problem, state specifically which method you used and what you did and what happened with error codes if any.

@IrvSp those instructions are the same as in the User Guide and did not work.

- there is no wired Internet connection at this end of the house to plug into

- the "connect your device to the router's wifi" instruction points the user towards the device's name & password, like TP-Link expects the user to connect the router to the device rather than connecting the device to the router. What I *need* is a way to tell the DEVICE the ROUTER's password so it can connect.

- at step 3, the Internet LED is not on. Step 4 says to login to tplinkwifi.net but I can't login through the device because it doesn't have internet access. When I login through my desktop which is connected to the house router, I get an error screen that my device isn't connected and NOT a login screen. I also tried the TPLink tether program but it doesn't detect the device no matter what I do.

MamaSylvia wrote

@IrvSp those instructions are the same as in the User Guide and did not work.

 

- there is no wired Internet connection at this end of the house to plug into

 

- the "connect your device to the router's wifi" instruction points the user towards the device's name & password, like TP-Link expects the user to connect the router to the device rather than connecting the device to the router. What I *need* is a way to tell the DEVICE the ROUTER's password so it can connect.

 

I would think the " 2.2. Access Point Mode " would work? Go to the wired router and connect it that way and use the Wireless.

Does that not work?

@IrvSp if the only way it will work is wired to a home router, I'll just return it because it would be useless to me. I need something to pick up internet from my phone in my RV and make it available to other devices in the RV. Router mode, hotspot mode, or range extender mode would work, and those possibilities are what I bought it for.

@MamaSylvia 

The SETUP document did show how to set it up with a Hotspot. If that didn't work, I'd contact Support.

@MamaSylvia 

Here is a FAQ that shows how to set up the 902AC to connect to an existing wireless connection to receive internet: https://www.tp-link.com/us/support/faq/2032/

For step 3, the .net address is just a fancy way to refer to the IP address of the device which by default is 192.168.0.254. So you would connect to the 902AC, either connecting an Ethernet cable to it or connecting to the default wireless network (wireless password is on the label). You then open your browser and enter the 192 address mentioned above. You do not need an internet connection, you just need to be connected to the 902AC somehow. 

Once logged in, on step 6, that is where you find the wireless network that is providing the internet connection. On step 7, the client setting, mainly the password box, that is the wireless password that any user would enter to connect to the wireless network you selected.

So for example, if someone came over to visit (902AC didn't exist), and they wanted to connect to your Wi-Fi to have an internet connection, whatever password you tell them to use, that is the same password you enter there. So think of the 902AC as being the visitor needing an internet connection.