Sensibility of items


I have problem with sensibility of openhab’s items.
In the image you can see that seem to be present more samples in the second graph instead first graph but is not true. The difference is only that values in the first graph are decimal (between 0.3 and 4.0 with step of 0.1) and in the second graph are integer (between 3 and 40 with sptep of 1).
I see that is not recognized the difference less than 1 integer value.
How I can improve this sensibility?

OH just displays values it gets delivered. It depends on your devices and their configuration what they’re sending. Check events.log for ‘raw’ data to arrive.