Can I connect a wired-only device to my wireless network using an Airport Express?
My main router is an Airport Extreme. I recently bought a Blu-ray player that only has wired internet (Ethernet-port). Since it is inconvenient to get a cable from the Extreme to where the Blu-ray player is standing I want an Express to share its wireless connection with the Blu-ray player via its Ethernet-port. Is this possible?
Yes, you can, and in my experience it works very well. I have a TP-Link router providing my wi-fi, and set the airport express up to connect to this. I use a cheap network switch to connect my xbox 360, blu-ray, and media centre pc to the airport express. I have been using it this way for over 6 months and so far it's been excellent. As an added bonus I also have it connected to my stereo and use it as remote speakers for spotify, itunes etc via AirFoil software.
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I do this with my Sony blu-ray player and an Airport Express. I have a Time Capsule as my main router and use two Airport Expresses to extend its networks, one for the 5GHz network and on for the 2.4GHz network. Both Airport Expresses are connected to audio devices and one is connected to my Sony blu-ray player via an ethernet cable. From memory there is a setting to enable the ethernet port on the Airport Express but it is a simple thing to do using the Airport Utility.