When using the Coffee Smarter, it would be very nice if the app could show if the filter has been cleaned of coffee and ready for a new brew.
I know that you cannot detect it, only that the filter has been opened (The display turn on).
So when the filter is open and close again the display should say "Is the filter ready to brew? " One button is yes the other is no.
In the app you could display the value, and the value should be set to no on a new brew and if the value is not changed unless you answer yes (And then it is yes until you brew again).