Sharp UP-X300

You need to go into back office and define the printer and tell it which port it's on etc. The x300 isn't the easiest thing to program. I assume you got a manual with it. You'll need it for all the different functions.
When it comes to a wifi printer my advice would be don't do it! From experience anything wifi seems to cause no end of problems with many reasons for causing them. Plus you would need a new printer.
There is a radio system for printers, called sprinters I think. They use standard rs232 ports and transmit from sender to receiver but not over a wifi network. They are slow though.