Short and sweet. This is the information my Firmware Upgrade page displays on my TL-WR841N router:
Firmware Version:|3.16.9 Build 151021 Rel.76995n
Hardware Version:|WR841N v11 00000000
This is the error I get when I try to upgrade:
Error code: 18005
Upgrade unsuccessfully because the version of the upgraded file was incorrect. Please check the file name.
Now, I've tried both the install and sysupgrade for v11 located on this page, as well as v3.x generic located on the same page. Apparently, these are not the right versions for my router. Am I missing something?