[mrtg] Re: How to graph temperatures from snmp query

[Kimmo Koivisto]

On Tuesday 15 March 2005 21:51, Manny Ortega wrote:
> What are you graphing?

Room temperature from the basement :)

> Just curious as to what the 1.3.6.1.4.1.5000 tree is.
>
Im using that OID to execute my own scripts at linux-server with dallas 
temperature server. OID is from example for executing scripts with net-snmp.

> You say you get "23.4", I'm not sure how MRTG will handle decimals, but it
> doesn't hurt to try ;)

Yep, it seems that deciamals are some kind of problem :
ERROR: Target[kellari.temp][_IN_] '1.3.6.1.4.1.5000.100.101. $target->[8]
{$mode} ' evaluated to '      ᎈde9153' instead of a number

I could execute shell script which woud filter out decimals and return 
temperature, but how to use custom scripts? 

I tried like this:

Target[kellari.temp]: /usr/local/bin/mrtg-check-temp.sh

but got an error msg:

ERROR: Target[kellari.temp][_IN_] '/usr/local/bin/mrtg-check-temp.sh' (warn): 
(Missing operator before rtg?)
ERROR: Target[kellari.temp][_OUT_] '/usr/local/bin/mrtg-check-temp.sh' (warn): 
(Missing operator before rtg?)

Any hints how this could be done?

Regards
Kimmo Koivisto

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