Check this thread https://forum.openwrt.org/viewtopic.php … 36&p=2
Was able to flash TL-WA730RE v2 using TL-WR740N v4 firmware and got it to work.
A lot of people are looking for alternate firmware for this model, since with stock firmware the wifi keeps dropping every hour or so. (Just google it), so why not make it officially supported. I am ready to assist with tests.