Your link to 2286 gets Page Not Found:
http://www.obihai.com/firmware/OBi-1-2-1-2286.fw
***6 is not finding it either.
looks like the patch is not yet uploaded...
the page is working now, but ***6 was still not working right after I manually downloaded the new fw, now I have manually update the OBi, I do not know if ***6 is working anymore
Apparently 1.2.1 (Build: 2286) is only available as a manual download / manual update.
Using ***6 to update your OBi will get you 1.2.1 (Build: 2283) instead (or nothing if you're already at 2283).