One of my favorite DIY IoT walkthroughs to share with colleagues and friends is the series that Bruno Terkaly put together for MSDN Magazine. Bruno covers end-to-end how a rainfall system can be developed in Azure with the management provided by a mobile application, and an IoT device used for the actual data collection. For the third part in the series, I had the opportunity to act as a technical reviewer (one of the many joys of working for a large enterprise such as Microsoft is the countless opportunities to do cool and new things). If you’re interested in IoT, I strongly recommend checking out the whole three-part series.
Part 1: https://msdn.microsoft.com/en-us/magazine/dn948106.aspx
Part 2: https://msdn.microsoft.com/en-us/magazine/mt147243.aspx
Part 3: https://msdn.microsoft.com/en-us/magazine/mt238406.aspx