Is it possible to get some kind of analog to digital conversion for input voltages from any of the existing modules?
What do the touch inputs measure on the touch-box?
I see they return a 12-bit value.
Unfortunately there is no module with typical analog input. The touch module UNIV 3.1.2.x uses analog to digital converters but as CTMU (Charge Time Measurement Unit) which measures capacity of inputs. It would require some firmware changes to make it pure A/D converter.