If your Wireless router is set up correctly using WPA/WPS encryption, (Forget WEP as its easily cracked) then unless the item you wish to connect can use WPA/WPS encryption, there is no way it will be able to access the router wirelessly unless the router encryption is turned off. (A definite no no as it leaves your network wide open to anybody with a wireless dongle or phone)
NOTE: Encryption does not apply to wired connections