This is a recipe to find out the operating temperature of your Raspberry Pi.

On the command line type after the '%' prompt:

  % vcgencmd measure_temp

It will return with the temperature, e.g.:

  temp=47.2'C

The vcgencmd command merely reads the value of a single line in a file written by the Raspberry Pi OS, a file located at:

/sys/class/thermal/thermal_zone0/temp

Divide the value found there by 1000 to get the ARM CPU temperature in more human readable format. Here's the bash script to do that:

cpu=$(</sys/class/thermal/thermal_zone0/temp)
echo "$((cpu/1000)) c"

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