You do NOT need windows to use Wi-Fi, but you do need a wireless router/access point which supports WPS (and a wired/wireless connection from your PC to the router). I think that's part of the problem for some people here.
I had the printer setup and working (scanning/printing) over the wireless network in 15 minutes.
I'll describe the steps from beginning to end, these should apply to other Epson models such as the SX230:
1. First you need to setup the printer, install the cartridges and wait until the power light stops flashing.
2. Go to
http://download.ebz.epson.net/dsc/se...search/?OSC=LX
and type "Stylus SX235" exactly as written into the search box. Don't include the 'w' at the end!
3. Downloading and install ALL four packages shown in the list
4. Cups should be restarted automatically, but if not do so manually
5. Press the WPS button on your wireless router and then within 30 seconds press and hold the WiFi button on the printer until the wifi light on the printer starts flashing. The light should turn steady green if it's connected, your router should confirm that this has been successful.
5. Go to
https://127.0.0.1:631 in the browser, Select Administration, Find Printer. (Disconnect usb first if you've previously connected it)
6. Click on the printer name, select Epson as the make and then Epson Stylus SX235 from the list of models. Click through the remaining dialogues and the printer will be added.
7. Print a test page just to make sure
Scanner
8. Assuming you know about Sane/iscan, the only step required here is to edit as root (sudo) /etc/sane.d/epkowa.conf - add the line "net {IP of printer}" (Cups will mention the IP during setup, otherwise check your router for the assigned address.
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