I thought I should post an update to this thread. I have written a beta Android app to work with this project over bluetooth. See Gampa Geek where all the code is listed for free and instructions given, all open source. The beta App is also on google play https://play.google.com/store/apps/details?id=biz.consett.relaxino&feature=search_result#?t=W251bGwsMSwyLDEsImJpei5jb25zZXR0LnJlbGF4aW5vIl0.
I hope it's useful. If you use it please link back to my blog.
Thanks
edit: It doesn't have any adverts on in-app nags either.