At my church, since the mixer is located in a separate room from where the stage is (sanctuary), we really looked forward to this feature of controlling the mixer remotely using UC Surface. Don't ask me why - we just happen to have this not-so-ideal configuration due to many reasons.
When we got the mixer, much to our disappointment we learned that the mixer does not have Wifi adapt built in. In other words, the only way the mixer can be on our church's internal network was to use Ethernet cable and physically connect it to the Wifi router.
The problem is that our Wifi router is yet in another room. LOL. So, it would've been some work to run Cat 5 cable up into the ceiling through the attic all the way to that other room.
My first workaround was to bring another Wifi router (I happened to have a Wifi router I wasn't using at home, after I upgraded it a couple of years ago), put it next to the mixer and connect the mixer to it. Whatever devices we want to run UC Surface on just have to be connected to this Wifi router - then we were able to control the mixer remotely.
This proved to be awfully inconvenient, however, since while connected to this secondary Wifi router we could not connect out to the internet from our phone/tablet, because this second Wifi is not connecto the internet. I guess connectivity to the internet is like air, something you don't appreciate and don't realize how much you need/use until you don't have it...
So the second workaround was to have an external Wifi adapter and connecting our mixer to the first (internet connected) Wifi router wirelessly. I did some quick search on Amazon, and found this product:
We have been using it just for a few weeks now, but so far I am very pleased with it. It is quite cool to work around the in sanctuary to different spots and be able to fine tune the mixing from my IPad while the band is practicing.