I had known about the Irrigation Caddy for a while, but was concerned about what I believed was the lack of a documented and supported API. However, a recent update to this thread gave me the confidence to finally order one. Of course, the first order of business (after setting it up, of course) was to write an Indigo Plugin for it.
I'm happy to say that the plugin is working great and supports the following:
As with my RadioRA Indigo plugin, I'm making this freely available for others to download and (hopefully) enhance.
The download and source code are available via bitbucket.
Please note that this is unsupported software and is being provided as-is with no warranty expressed or implied.