Chamber temperature

What is the problem?
notice this (i think new) chamber temperature info
how can i hook a sensor to use it?

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)
skr 1.3
pi 3 b+
octoprint 1.4.0

You can use this: OctoPrint-Enclosure

thanks. i know but here i got a graph
and if i remember right when i used this plugin he wasn't showing the temp on the dashboard
i had to press a tab to see it

In the printer profile there is a check box for heated chamber. This will turn on the display in the temperature graph. This is support for a firmware based chamber.

Marlin has M141 and M191 commands to set (and wait for) the chamber temperature and M105 will report the chamber temperature in addition to the other temperatures it reports.

If your printer / firmware doesn't support a heated chamber, then you can use the plugin like the one @Ewald_Ikemann pointed out.

If you wanted a do it yourself solution, you need a printer controller board with room for another thermistor (or other temperature sensing probe), another set of heater terminals, and you would have to be able to build your own firmware.

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(or you could just uncheck the option in the printer profile)

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I just checked it. Enclosure Plugin Room Temperature is not displayed in the graph.