I am really frustrated because nothing I do seems to be working. (When I say printer 'wifi', I mean I go to my wifi networks, and connect to the printer that way). I wouldn't have a problem with using the USB except now my roommate can't use the 'wifi' to print either. It used to be Bonjour before but I cannot figure out how to get it to use Bonjour again. When I add it in Printers and Scanners, the kind says USB Multifunction. I can only use it when I am connected to it via USB.
Now, my printer will not emit any 'wifi' connection at all. My printer would not let me print without connecting to it's wifi so I asked a question on here the other day about trying to fix that (that way I could use my internet wifi at the same time, instead of waiting for everything to print). My mac and printer were working fine before I started messing with it.
I deleted my printer from my Printers and Scanners section in preferences in my Macbook. I have an HP Deskjet Ink Advantage 2540 All-in-on version 2.3.2 running on my Mac, OS 10.12 Sierra.