WA850RE firmware downloads:
If you want the upgrade the default tp-link firmware to openwrt firmware you need to flash the openwrt-ar71xx-generic-tl-wa850re-v1-squashfs-factory.bin
When you are already running openwrt, you can flash with openwrt-ar71xx-generic-tl-wa850re-v1-squashfs-sysupgrade.bin
WA750RE firmware downloads:
If you want the upgrade the default tp-link firmware to openwrt firmware you need to flash the openwrt-ar71xx-generic-tl-wa750re-v1-squashfs-factory.bin
When you are already running openwrt, you can flash with openwrt-ar71xx-generic-tl-wa750re-v1-squashfs-sysupgrade.bin
Fix WA850RE V1.0 Firmware 3.13.27 Build121119 Rel.609994n
If you have the Tp-link wa850RE and are unable to upgrade to a newer version tp-link firmware/openwrt, one of the following images:
Tp-link firmware to fix wa850 hwid85000011 v1.0 or Tp-link firmware to fix wa850 hwid08500011 v1.0, click download on the newly opened page
Also if you try to flash the incorrect version of the firmware mentioned above to fix the wa850, it will not brick it.
This is a slight modified version of the TL-WA850RE_V1.20_130922 after flashing the slightly modified version future upgrades will be as normall
md5sums.md5
Martijn's Pagina :P