Just to let you know that I was able to get the OpenPi running nicely with a WiFi dongle and have started programming a full interface with schedules and such in PHP, Apache web server and C. Did not feel the need to include MySQL for such an application, that way I keep the overhead low as well.
The code is far enough where I am actually using it real-life now to control my back lawn and planters sprinkler valves.
Lately I have been playing around with code to interface with the NWS weather data and writing an algorithm to automatically adjust the schedules based on the coming week temperatures.
As with everything code-wise lots to do and the devil is in the detail, but I have been making nice progress. Once the interface is polished enough I can publish the code on a regular website for viewing (don’t want people turning on and off my sprinklers 😀 ).