On 06/03/2018 17:07, Tom Osier wrote:
> Hi All,
>
> Am trying to monitor GPIO using SNMP but get zero values for snmp queries.
>
> I think its got something to do with the user access rights.
>
> I have created an "snmp" user and given him sudo rights but still get a zero
on the snmp query. I also added user snmp to gpio group.
>
> The bash code is as below (GetStatus01):
>
> Code: Select all
>
> #!/bin/bash
> if [ "$1" = "-g" ]
> then
> echo .1.3.6.1.2.1.25.1.9.0
> echo gauge
> sudo python3 /home/pi/myFlask/GetStatus01.py
> fi
> exit 0
>
> The output of bash script is ok as below:
>
> Code: Select all
>
> pi@raspberrypi:~ $ /home/pi/myFlask/GetStatus_01 -g
> .1.3.6.1.2.1.25.1.9.0
> gauge
> 1
>
> "GetStatus01.py" prints a "0" or "1" based on the gpio pin status
>
>
> The file snmpd.conf has been modified as below:
>
> Code: Select all
>
> pass .1.3.6.1.2.1.25.1.8.0 /bin/sh /home/pi/snmp-temp -g
> pass .1.3.6.1.2.1.25.1.9.0 /bin/sh /home/pi/myFlask/GetStatus_01 -g
>
> The "snmp-temp -g" points to the pi temp code above and this works ok when
snmp data is requested by an external program
>
> But "GetStatus_01 -g" always presents a zero result.
>
> Am I missing something?
> Tom


I had a similar issue, which required making the users pi and snmp a
member of the group: i2c.  Perhaps you need something similar.

See:
   http://www.satsignal.eu/raspberry-pi/monitoring.html

in the paragraph starting:   A problem ...

That was from help here on this group!


--
Cheers,
David
Web: http://www.satsignal.eu

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