I’ve got a small project and wanted a piece of quick advice. Basically, I have a rowing machine (Kettler Kadett) with a simple computer that tracks strokes, distance, frequency, heart rate, etc. The rower works great but the computer stopped working, and I want to use a photon to do the same and more (automatically log a workout to a web server). The rower has a really simple reed switch sensor that picks up whenever the seat passes over it (twice per stroke: one forward and one back).
So my question is simple: given the timing of the front and back stroke (easily less than a second), should I use interrupts to capture individual strokes and then occasionally (every 5 secs) aggregate them? Or just use a simple loop with a short delay and do it that way? Or is there some other way? Also, any thoughts on the logic for tracking the strokes and aggregating them into speed, etc?
I am also considering a simple touchscreen interface, so may switch the project to RaspPi!