I don’t know what EAP is, FON is an open network that you login using a username and password…
I arrived here by going to http://lechacal.com/wiki/index.php/Repeat_a_Wifi_Hotspot and then to the https://wiki.openwrt.org/toh/tp-link/tl-wr703n that is now not sold anymore this site point to the GL-AR150 as an alternative.
They use Luci to setup the WISP bridge, I latter also found a script to auto login https://forum.openwrt.org/viewtopic.php?id=57117 but this is not the most important part to me. I am new to this and just want to make sure I purchase the right device to build the bridged connection.