Snmp binding - items stay empty

Add-ons Bindings
1

Hi there

I would like to get some information from my network devices by using the snmp binding. Currently I try to get the uptime from my firewall.

I have some problems getting the snmp binding to work. After changing the port to 1030 in the snmp.cfg i finally see something going on by tcpdumping on port 1030.

08:48:34.856218 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 76)
    10.4.4.254.snmp > 10.4.4.111.1030:  { SNMPv1 { GetResponse(33) R=2108097992  system.sysUpTime.0=2436890100 } }

As you can see, i get an answer with the correct uptime. But if i list the items in KARAF, the FW_Uptime is still State=NULL

openhab> items list
fwTS_UpTime (Type=NumberItem, State=NULL, Label=FW Uptime, Category=null)

The item in the items file looks like this

Number fwTS_UpTime “FW Uptime [%d]” { snmp=“<[10.4.4.254:public:.1.3.6.1.2.1.1.3.0:10000]” }

And on the sitemap

Text item=fwTS_UpTime label=“test [%s]” icon=“network”

OH2 is installed on Raspberry Pi.

Version OH2 2.0.0-SNAPSHOT Build#526

Thanks for your help.

2

Item type Switch can only be ON or OFF, you need to use Number.

3

Thank you pensionado

I just changed the switch to number. unfortunately, the item still has the state NULL.

4

Did you follow the guidelines in the SNMP binding for setting up to correct binding ?.
BTW I didnt change any ports and it is working like a charm.

One of my items look like this:
String Rtr_uptimeFormatted "Router running [%s]" (System) { snmp="<[192.168.88.1:public:.1.3.6.1.2.1.1.3.0:60000]" }

and this works without changing ports.

5

Got it. Thanks.
I had Number in the item instead of String.

Thanks a lot