Am I correct to assume that if a polled point does not change from the last sample, a new pointvalue is not going to be persisted to the DB? I got an HTTP retriever going out for weather and it does not change much from that source. The mySQL db has the just first sample.
From a trending perspective I trend internal temp with external temp. Until I set up a temp sensor outside, the external site will do. The issue is that the slow changing temp is not interpolate along with the other trend. Even as a single trend for external temp, I would expect a horizontal trend line. I get a single point.
I can live with that constraint for now and implement a different charting approach to deal with interpolation.