Ethernet cable to wifi bridge compatible with Tmobile Home Internet

One of the issues with T-Mobile home internet is finding the right location for the modem.  I have found one and it is working great.  However, that means I need to move run a new ethernet cable from the solar monitoring station to the new gateway.  Can you buy a device that you can plug an ethernet cable into to convert to WIFI work with a T-Mobile home internet gateway?  An ethernet to Wi-Fi adapter.  

I found one that works great.  It is a TP-Link AC1200 model RE315 ($29 device) ordered from Amazon.  Took a 2-foot ethernet cable from the solar monitoring station and connected it into the TP-Link device that was plugged into an electric socket.  Much better for me than moving a cable that is several hundred feet.  Plus, if I ever have to move the T-Mobile gateway, I don't have to run a new cable again.  As a side benefit, my WIFI range is extended since the device functions both as an ethernet to WIFI adapter and a WIFI network extender.  

My T-Mobile Home internet device is a Sagemcom Fast 5688W Gateway.