How to represent a universal device poller with 2 states in NPM?

Hi,

I have set a UnDP that gets the state of a contact closure in my device (Asentria siteboss 550-6). There's just 2 states: open or closed. My question is: is there a way to see graphically the state of my UnDP, I mean we can use charts and gauges if there are numerical values, but in this case what id the appropriate way to do it? You know monitoring is all about colors and indicators...

Also, I would like to be able to put my UnDP in NPM Atlas, but it shows me that there's no metrics assigned to my UnDP, so I can't set thresholds to update its status in the map I mean (critical, warning...).

can anybody help me with this?

thanks.