TasksOfOhm has posted a tutorial on how to unbrick TP-Link TL-WA801ND v2:
Experimenting with embedded devices is fun but things not always work as expected. Sometimes you just flash the wrong firmware. So did I. After having done so I furthermore realized that the bootloader in my TL-WA801ND v2.1 was the current one and therefore contains a bug (or maybe it was deliberately crippled?). The impact of this bug was that you’re not able to load something via TFTP from the bootloader. How to unbrick this device? Is it possible at all? To anticipate the answer: It is. But at intermediate level…
The very first step was to identify the flash chip itself. In the picture below I marked the flash on the PCB. It is located next to the UART header JP1 (unpopulated in this picture). It is a S25FL032A/P from Spansion.