Computer question... Ddwrt router to connect projector wirelessly???

i’m trying to set up a projector wirelessly. The projector had the option of coming with a wireless dongle but could not bring myself to paying the 200 for it. I figured that a router using a ddwrt in adhoc mode and connecting it to the projector will allow the computer to connect to it wirelessly. Would anyone have any idea how to set up the router in adhoc mode? I selected the mode in one of the wireless menus but that’s as far as I got. Google searches haven’t really brought up anything too relevant. Help?

FYI, this is only temporary while the wiring is finalized.

This is also for work.

Update, I wired the computer and projector into the router and was able to connect by using the supplied projector software. Thrived the same withawireless connection between the router and the computer and I was not able to see the projector