I'm actually starting to wonder if I didn't properly enable BT on the WU111. I did have it in "pairing" mode (i.e. hold junction box button for half a second so the green/red lights alternated) but if my memory serves me correctly even when I tried to just pair it to the iPhone using Settings -> Bluetooth in iOS (not within E-Tube Project) the EW-WU111 ever showed up as an option to pair to. Will check when I get home, maybe use the PC app to check out BT settings.