I read up the ospi kit and I obviously had a fundamental misunderstanding of what it provided and what I would need. I was interested in just the development on a netduino or raspberry pi board without requiring extra hardware. This may not be possible due to hardware constraints and such. I will continue to read up on this product. I honestly really like it and will likely purchase. Just a question, though. Are there any advantages / disadvantages to open sprinkler vs ospi?