Sensor state (alive/unknown...)

[vzorglub (Vincent Regaud)]

You may find this design pattern useful:

Design Patterns: Generic Is Alive

Edit: Rewritten for OH 4. Please see https://community.openhab.org/t/design-pattern-what-is-a-design-pattern-and-how-do-i-use-them/40319 for a description of what Design Patterns are and how to use them. Problem Statement Many sensors report status to openHAB periodically (e.g. temperature sensor) or unpredictably (e.g. motion sensors) and a subset of these sensors do not have a built in way for openHAB to query whether or not they are alive. The only way for openHAB to detect that these devic…