programmable bread machine for experimenting?

Is there a bread machine that allows me to modify parameters of the various baking program?
E.g. change the temperature for rise change the time for rise change the time for mixing etc.
The temperature and time for rise is the most important. I think my bread are too dense because my current bread machine rise time and temperature is not optimal.
Also, be able to bake a small loaf (1 lb or less)? Since I experiement with receipes, the smaller the better, in case I need to throw the bread away.
I searched for bread machine with USB interface but found none. I guess bread machines are not as smart as I wish.
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