[FEATURE REQUEST] Add option to ignore fan during calibration

[spec-chum]

I have a custom loop obviously with a pump - I really like auto calibration feature, but when I use it it drops my pump to 0, not for long, but I really don't want the pump speed to be touched.

Apologies if I've just missed it, but can you add an option to ignore a "fan" (pump in my case) when doing auto calibration?

I do want to monitor it's speed, so don't really want to unpair the speed sensor.

Just thought while typing this as well, is there a way to trigger an alarm or something if a speed sensor goes below a certain RPM?