a lot of logic approch a lot of hw devices

a lot of logic objects need to approch to meny devices.
the solution today: interface class implemented in a single class containg all the dfevices.
Problem: the interface becomes a garbage collector.

question: each logic class needs to approch to only few devices.
the logic class need to stay encapsulated from devices.
there are devices whice serve several logic classes

How do I reduce the interfaces in one class which encupsulates the "who does what" among the devices?
Do someone have a solution/design pattern to this problem ?
Hmm, i think our spam filter is broken... I didn't understand a word.
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