I’m using a Pro Micro to run an irrigation flow system. It monitors the flow on each zone of my home irrigation system and alarms when the flow is off by more than 30%. It took me over 9 months to develop and document the project which I now freely give away. My hope is that someone else will bring it to market.
Here are all of the details including the code: http://rick.sparber.org/electronics/FMC.pdf
Enjoy!
Rick Sparber