Hey. im new to tweaking with sw. i just wondered if it was possible to turn my omnia router into this: Wifi pineapple ? So i know that both of these run open-wrt, but i dont know where to start, or if this is going to work at all (without bricking the device). Here is a link to the pine ap github: Wifi pineapple Git. 
I haven’t studied it deeply but it seems to me that it’s just a collection of software. It should be easy enough to build it for TO. I think that you have to just clone this repository https://github.com/WiFiPineapple/openwrt-packages-community to openwrt sdk (you can use pre-built one from repo.turris.cz/omnia) and compile packages from it. We have no documentation for it now but I will make one some time in future. So for now ask me if you are lost.