In my world, final is relative, more accurately I don't seem to ever be entirely happy, or my empty life is so boring I keep thinking of features to add.
Here's a challenge for "learning time"…
Although we can see that the flushing is happening, and perhaps understand it will happen again because we see the valve solenoid, it would be nice (and impressive) to add some LEDs for a little status panel.
Use your imagination, but I'd add one LED that indicates that a 20 second flush is in progress, and another that indicates that we are in the one hours waiting period.
Indicate phase one: just LEDs that are on during those times. Too easy.
Indicate phase two: make the appropriate LED blink at a nice rate to show action is happening.
Or not. I never set my heart on it, but today is a perfect beach day and I would bet she who must not be kept waiting will text soon that she is rolling towards me and off we shall go.
a7