Hello,
I have done similar project using dd-wrt modifying an ASUS RT-n10U. Our goal was to create some coupon for very cheap price and serve it to local food-court using the local bandwidth.
To be frank, the version 1 was unstable, and after doing my research for a long time about 1 month full-time without getting paid, I stopped working on this project.
I have used Coova, wifidog. Their documentations are like the most antique scriptures of the history of human race! This project should be lengthy, since I have to write another firmware if all those Coova, Wifidog don't suit me at last.
If you are interested doing this project, we can discuss. And after discussion we can find out what should be the milestones. Thank you!
Shamir
**Btw, I have stack pile of TP-link 841 for testing. It should be easy to start.