I’m working on the breath detection software and the device design. I’ve concentrated on detecting the breathing in and out and the event between breaths. Especially the distinction between in and out is hard as there is wind flow in both cases. So I use the difference in temperature to detect the in and out. I set two calibration points (by pressing a different key), one between breaths and one after completely inhaling. In both cases I take the wind value and the temperature value. With these two extremes known I can now detect the breath status in a rather robust way. View the screen dump from Processing:
I rather like the space look of the breathing cone. More work should be done on it of course:
