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Thanks again. I have answered my own questions. I found the SM.h library in your Arduino Flowmeter with a state machine Instructable. It compiles best in IDE 1.0.1.
Thanks for this work. Looks really interesting. Unfortunately it looks as if the <SM.h> library has been pulled off the Arduino site. There is one on Codebender but I suspect it is not the correct one. Do you have any indication of where the <SM.h> library lives? Alternatively a downloadable on the project page might help. Also I see there are issues with <SM.h> and Arduino IDE. Which version did you use for this project? Thanks.