How to get the last 5 values from the RRD4J?

[HaKuNa (Remo M)]

I use this to filter faulty values, but changed the filter criteria if the difference is too big.

Filter Profile

This comes up periodically so I figured I’d write a quick tutorial since I had to implement this temporarily in my OH instance to debug a problem. This will probably become a design pattern at some point. Problem Statement Some sensors report really frequently, let’s say every second, and each update has a tiny change. For example, a temperature sensor reports values with changes of 0.01 or smaller with each update. For persistence you can filter changes like these out so they don’t fill up you…