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Temperature measurement on HifiBerryOS

Rainer Schreiber

August 27, 2021 17:13

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Hi all,

I just installed HifiBerryOS on my Raspberry Pi 4B with a HifiBerry DAC2 HD attached to it.

Besides this hardware, I already added a 5 volt fan to it as well, PWM-driven via GPIO port 23 and a MOSFET. The python script that I wrote uses vcgencmd measure_temp to measure the temperature of the Pi, and based on that measurment it controls the speed of the fan. This worked great on Raspberry Pi OS with raspotify.

But now on HifiBerry, this vcgencmd measure_temp package is not installed, and as far as I know I cannot install it either.

Does anybody know how to install this package?

Or maybe there is another package present that can do the temperature measurement?

Or can I ask HifiBerry to add this package to the OS in a next release?

Kind regards,

Rainer (Utrecht)

 

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2 comments

• 0
  
  HiFiBerry team August 28, 2021 06:13

  Usually no fan is needed at all, but have a look here:
  https://www.hifiberry.com/blog/does-the-pi4-really-run-hotter-then-the-pi3/

• 0
  
  Rainer Schreiber August 28, 2021 18:01

  Thanks for the quick response!

  At a first glimpse, the command

  cat /sys/class/thermal/thermal_zone0/temp

  does work on HifiBerryOs, so I am happy that I can continue with my project.

  I am getting integer values that seem like celcius values without decimal delimiter, but I wil google for it to see how to interpret them.

  Thanks again!