We may sell a cheap little board that is a simple interface to keep everything together. I have to talk to Tim about that. But the software can interpret functions. And a function is easily created from datapoints as an approximation as complex or simple as possible. Right now only power series are supported for non-linearity really, but I can add logarithmic, or periodic or something like that. And I am not sure if you are familiar with taylor series, but all functions can be modeled with a power series or a specific range, so techically right now all functions are possible.
And yes you can turn an output on at a certain threshold, or you can play a sound at a certain threshold, or change the picture (to an animated flashing warning gif), or anything like that already.