MQTT sensor how to use timestamp for data

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1

Hi,
I have mqtt sensor which reports temp data into MQTT. It works fine. I have in HA enable autodiscovery, so sensor is found automatically. But I have small issue, when sensor is offline, the value of temp is still the same until it changes in mqtt again.
You can see it in picture.

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image1123×442 20.6 KB

What can I add to mqtt values so it doesnt show when offline, would timestamp help? basically I just want to see a gap in there. i dont see like timestamp value in mqtt sensor doku.

Regards,
JIV

2

Not sure what this means. What do you want to see? “unknown”

3

Well, yea probably. Anything that would break showing it in graph.

4

OK, I found it. I need LWT and availability_topic . Seems now it works.