Hello GBATemp.
It's been a very long time, hasn't it?
In fact, it's been a little over seven years since I last spoke here.
Well, I left the forum for a reason, and those reasons haven't changed much over the years. But it wasn't all bad, was...
I was one of the devs back when homepass was a thing, too bad we didnt do some packet capture back then... maybe we could have a re-implementation of the server
Anyway, i have some ideas to implement for this project to be more "interactive"...
Forget bluetooth since the 3DS is wifi based.
For that you would need direct access to your wifi card to "hand make" your own wifi packets compatible with the 3ds streetpass.
Nevertheless, good idea sorunome! If you can implement some background...