How to discover SNMP OID information for Home Assistant

SOUK

Is their any way to obtain or discover PfSense OID's for things like:

cpuLoad
users
processes
disk-size
disk-usage

Or any others that are useful or worth monitoring and displaying in Home Assistant setup?

I've followed the Home Assistant notes and have entered some code like it suggested to add in to the /config/configuration.yaml file on my Home Assistant server. (code is below).

I did that and it appears to at the very least now detected or formed some form of communication between Home Assistant and Pfsense, which is cool:

The code below was what I entered.

# Example configuration.yaml entry for SNMP version 1 or 2c
device_tracker:
  - platform: snmp
    host: 192.168.1.1
    community: public
    baseoid: 1.3.6.1.2.1.4.22.1.2

So far all that basically pulls in though is my network device status, showing whether it detects my mac addresses online or offline status.

I'm now trying to work out how to pull in the other information like:

cpuLoad
users
processes
disk-size
disk-usage

But to do that I need to discover all the OID's used I guess. So my primary question is, is their any commands i can run in pfsense to obtain OID details or are their any websites i can visit to establish them?

johnpoz

@souk said in How to discover SNMP OID information for Home Assistant:

is their any commands i can run in pfsense to obtain OID details

You could just do a snmpwalk this would list out everything..

This might be helpful
https://www.youtube.com/watch?v=CKPbIeiJ2AQ
Monitoring pfSense 2.4 with SNMP

disi1

@SOUK Home Assistant has an active Integration for pfSense via HACS.
https://github.com/travisghansen/hass-pfsense

It gives CPU, Memory, Leases, Disk etc.

What it doesn't give is in/out on an interface. I get this via snmp:

in OiD
1.3.6.1.2.1.2.2.1.10.6 where .6 is the interface number
out OiD
1.3.6.1.2.1.2.2.1.16.6 where .6 is the interface number

sensor:
# read the Bytes in/out on an interface in an interval
  - platform: snmp
    name: asa5512x1_wan6_in
    host: 10.10.10.1
    community: dom
    baseoid: 1.3.6.1.2.1.2.2.1.10.6
    accept_errors: true
    version: 2c
    scan_interval: 20
  - platform: snmp
    name: asa5512x1_wan6_out
    host: 10.10.10.1
    community: dom
    baseoid: 1.3.6.1.2.1.2.2.1.16.6
    accept_errors: true
    version: 2c
    scan_interval: 20
# calculate the gradiant of the bandwith of the asa5512x
  - platform: derivative
    source: sensor.asa5512x1_wan6_in
    unit_time: s
    unit: B
    name: asa5512x1_wan6_in_der 
  - platform: derivative
    source: sensor.asa5512x1_wan6_out
    unit_time: s
    unit: B
    name: asa5512x1_wan6_out_der 
# calculate MBps and MiB between intervals of the asa5512x
  - platform: template
    sensors:
      asa5512x1_wan6_in_mbps:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in_der')|float*8/1000000)|round(2) }}"
        unit_of_measurement: 'Mbps'
        friendly_name: Internet in Mbps
      asa5512x1_wan6_out_mbps:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out_der')|float*8/1000000)|round(2) }}"
        unit_of_measurement: 'Mbps'
        friendly_name: Internet out Mbps
      asa5512x1_wan6_in_mib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in')|float/1000000)|round(2) }}"
        unit_of_measurement: 'MiB'
        friendly_name: Internet in MiB
      asa5512x1_wan6_out_mib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out')|float/1000000)|round(2) }}"
        unit_of_measurement: 'MiB'
        friendly_name: Internet out MiB
      asa5512x1_wan6_in_gib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in')|float/1000000000)|round(2) }}"
        unit_of_measurement: 'GiB'
        friendly_name: Internet in GiB
      asa5512x1_wan6_out_gib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out')|float/1000000000)|round(2) }}"
        unit_of_measurement: 'GiB'
        friendly_name: Internet out GiB

And for the totals (day/month):

utility_meter:
# asa5512x1 wan usage
  asa5512x1_wan6_in_gib_monthly:
    source: sensor.asa5512x1_wan6_in_gib
    cycle: monthly
    name: Internet in monthly
  asa5512x1_wan6_in_gib_daily:
    source: sensor.asa5512x1_wan6_in_gib
    cycle: daily
    name: Internet in daily
  asa5512x1_wan6_out_gib_monthly:
    source: sensor.asa5512x1_wan6_out_gib
    cycle: monthly
    name: Internet out monthly
  asa5512x1_wan6_out_gib_daily:
    source: sensor.asa5512x1_wan6_out_gib
    cycle: daily
    name: Internet out daily