I did something similar a couple years back except thermally by monitoring the dryer exhaust temp and ran into a problem where apparently "permanent press" means cold air for the last 10-15 minutes. Ok then that meant a timer initiating when the temp drops below whatever. I would imagine this will show up in your current monitoring where the heating elements turn off but the tub keeps spinning. Of course you may be monitoring a gas dryer LOL. Good luck it'll be fun.

Which current sensors are you using? This sounds interesting.