Error "open .: is a directory" about fan2go HOT 4 CLOSED

Ah, my bad. Sorry, I messed up sensor and fan. I'll check on Monday whether it will work after adjusting the configuration.
It may help to check in fan2go config validate whether the id corresponds to Sensors and/or Fans in fan2go detect.
In your example you give in the readme, the id has both Sensors and Fans but here this is not the case, which I missed when I blindly copied your example file ;)

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Yes thats what I thought too. It might be tricky to validate this correctly though, since it can only work on the target system. This would mean that the successful validation of a config only applies to a given system, but I guess that makes total sense anyway.

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Hmm, so this error basically says that fan2go tried to measure your fan curve, but failed immediately, because it was unable to set a PWM value for the fan.

I see that you have defined your fan to be platform coretemp-isa-0:

fans:
  - id: cpu
    hwmon:
      platform: coretemp-isa-0
      index: 1

but fan2go detect doesn't output any fan inputs for this platform.
You probably should use one of the dell_smm-isa-0 fan inputs instead.

Nonetheless this is an interesting edge case that is not yet detected, and we should add a test for this to prevent cryptic error messages.

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Thanks again, now fan2go seem to work.
(I noticed a different issue, unrelated to fan2go, namely that the fan can be either at 0 or at max speed and no value in between is accepted right now; seems to be a hardware issue. Thus I cannot fully test fan2go right now).

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