1) The TIU is Rev L (sticker on the bottom), with firmware 6.10 (reported by a query in the DCS app). The WIU is Wifi DCS 1.0 (sticker on the bottom). I'm using an iphone as one device, and an ipad as another, both with the app downloaded from the app store (3.2.1).
2) The WIU is set to Home, and is connected via WiFi to my home router. The WIU, iphone, and tablet are all using the same secured WiFi network.