CPU Temperature not working with 2.13-beta6

[SabineTobi]

Hi!
With version 2.13-beta6 I can not monitor the CPU Temperature with the template temerature.conf. RPi-Monitor is showing only NULL as temperature!
With version 2.12-r0 it does as expected.

Regards,
Sabine

[Lusbueb69]

Same Problem and my Workaround is this, with all digits:

Change Line 14 in the temperature.conf from:

dynamic.1.postprocess=sprintf("%.2f", $1/1000)

to

dynamic.1.postprocess=$1/1000

[hackslikeus]

for those of us still using ye ol fair in height: (not sure why $1001 is italicized below, but use the example above-same formula)
dynamic.1.name=soc_temp
dynamic.1.source=/sys/devices/virtual/thermal/thermal_zone0/temp
dynamic.1.regexp=(.)
dynamic.1.postprocess=($1*.001)
dynamic.1.rrd=GAUGE

dynamic.20.name=sof_temp
dynamic.20.source=/sys/devices/virtual/thermal/thermal_zone0/temp
dynamic.20.regexp=(.*)
dynamic.20.postprocess=((($1/1000)*1.8)+32)
dynamic.20.rrd=GAUGE

[beohna]

Same problem with the CPU Temperature (2.13-beta6 ).

Why is there no new beta?

[beohna]

The workarounds above didn't work on my raspi 4B.

[JappeHallunken]

Another workaround, shows no decimal places at all:
dynamic.1.postprocess=floor($1/1000)

Tested on a RPi 4B

[JappeHallunken]

Or maybe ceil() would be the better choice for temperatures, because it's rounds the value up.

[MichaIng]

The problem is the "new" ability to define multiple postprocess steps comma-separated: 56ba6e9#diff-ba4b03131626dc7d144ab66856ad8f9306bad3c958e5a20cda2a0a9e655208d4R777

Since sprintf("%.2f", $1/1000) contains a comma, it is broken and evaluated in two parts 😄. So yeah, we need a function/method which does not contain any comma. Instead of lower(), I suggest int($1/1000 + 0.5) to have correct rounding instead of always rounding down. But better would be something with decimal support, of course. I'm no perl coder, but will have a look into possibilities.

[wsegatto]

Better yet, @MichaIng, if you want decimal places with the 'int' function:

int($1/1000) --> No decimal places
int($1/100)/10 --> 1 decimal place
int($1/10)/100 --> 2 decimal places

Why do you mean when you said "'new' ability"? What's changed? RPIMonitor? There hasn't been a commit for so long now. I wonder what you meant by that. Just curious.

[MichaIng]

@wsegatto
Thanks for your suggestion. But this will always round down, isn't it? The + 0.5 assures it is mathematically correctly rounded, so up from .5 on. Would this work?

int($1/10 + 0.5)/100

Why do you mean when you said "'new' ability"?

Yeah, the commit is from 2018, hence the quotation marks 😉. Interesting that the bug was reported 3 years later the first time 🤔.

[MichaIng]

Ah lol, we went that way already. Too long ago so I forgot about the details: https://github.com/MichaIng/DietPi/pull/5232/files