Is sensord supposed to work on the Pi?

No it doesn't work; the Pi doesn't have any of the sensor chips used on PC motherboards which sensors-detect is looking for.

Below is something very similar using RRD. Put the following in a script file and get cron to run it every 5 minutes. You can then use the graphing tools with RRD in the same way as sensord does.

----- #!/bin/sh

rrd="/run/temp.rrd" if [ ! -e "$rrd" ] then echo 'recreating rrd file!' rrdtool create $rrd DS:temp:GAUGE:600:0:120000 RRA:AVERAGE:0.5:1:288 RRA:AVERAGE:0.5:7:288 fi

t1=`cat /sys/devices/virtual/thermal/thermal_zone0/temp` upper=84000 lower=0 if [ "$t1" -lt "$upper" -a "$t1" -gt "$lower" ] then t2=`cat /sys/devices/virtual/thermal/thermal_zone0/temp` if [ "$t2" -lt "$upper" -a "$t2" -gt "$lower" ] then tmp=$(($t1+$t2)) tmp=$(($tmp/2)) rrdtool update $rrd N:$tmp # echo "t1 = $t1, t2 = $t2, temp = $tmp" fi fi

-----

Dave

OK, I guess it's just in the repository as a "left-over" from Debian.

Actually, it looks like all I need for now is this line:

which I'll combine with a syslog command, since I'm just used to finding that sort of thing in the syslog. But the database/graphing stuff looks interesting in the long run.

I guess the number that comes out is degrees C * 1000?

Thanks!

An alternative command in Raspbian is vcgencmd measure_temp, like this:

pi@raspi2 ~ $ vcgencmd measure_temp temp=42.2'C

I see that command is well documented in the system: ;-)

$ man vcgencmd No manual entry for vcgencmd See 'man 7 undocumented' for help when manual pages are not available. $ vcgencmd --help error=1 error_msg="Command not registered" $ vcgencmd help error=1 error_msg="Command not registered"

Curiously, I get varying results from that while the thermal_zone0/temp file doesn't change:

$ cat /sys/devices/virtual/thermal/thermal_zone0/temp ; vcgencmd measure_temp

Why is that?

I suspect it's just 'noise' on the sensor output. That's why my script takes two measurements and averages them. Occasionally I've seen completely wild figures, so the script rejects any nonsensical values.

Interesting, thanks.

At the three mile island nuclear power plant the operators ingnored ``nonsensical'' temperature values...

Ron

More people died at Chappaquiddick..

YMMV, but nuclear power is way outside the scope of anything I'm planning to use the Pi for.

But no one got cancer.

On Fri, 12 Jun 2015 16:00:33 -0400, rickman declaimed the following:

But Chernobyl ensured the silence of the "Russian Woodpecker" (The Kenwood R-5000 actually had a second noise blanker function designed just for the woodpecker...)

No pone got cancer at 3MI either.

My comment was meant to be somewhat hyperbolic about ignoring ``nonsensical'' temperatures. I should have realized that some people get political at the mention of nuclear and I apologize for thoughtlessly polluting the group.

Please. Any further discussion to e-mail or an appropriate group.

Ron