Bernd wrote, on 12-01-2019 09:20:
> Meanwhile I have found how to measure the temp
> from the RasPi.

Readable output, not directly useful in scripts:
$ vcgencmd measure_temp
temp=46.2'C

Value in millidegrees:
$ cat /sys/class/thermal/thermal_zone0/temp
47236

Value in degrees rounded down, so 47.9 becomes 47:
$ echo $(($(cat /sys/class/thermal/thermal_zone0/temp)/1000))
47

Value in degrees with one decimal, using bc:
$ echo "scale=1;$(cat /sys/class/thermal/thermal_zone0/temp)/1000" | bc
46.5

The same thing without bc:
$ vcgencmd measure_temp | cut -d= -f2 | cut -d\' -f1
46.2

(The decimal separator is not localised for any of these.)

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