SNMP?

[Zitt]

I've gone down the rabbit hole of building out an official homelab using ProxMox on a previous generation motherboard system. In that case; I've installed a picofan that handles a couple of fans and outputs three sensors.

One of the virtual machines I run has Observium running to monitor the health of the system the picofan is running. Have you considered making fanpico respond via a SNMP server? Observium doesn't seem to have a MQTT plugin. It's be nice if Obvservium could monitor the fan pico for it's database.

I know this isn't a trivial ask; not even suggesting it makes sense. Just wondering if anyone thought it was a good idea.

[tjko]

lwIP has support for SNMP, so implementing basic SNMP support shouldn't be too difficult. I think where it gets complicated is how to expose all the fan/sensor information via SNMP. I'm not sure if there exists some free/public MIB that would work (?)
Or would it require creating a new MIB, etc...

[tjko]

I did quick test to enable SNMP Agent included in lwIP and it seems to work fine (initial test is available under "snmp" branch currently).

$ snmpwalk  -v1 -c public 192.168.4.170
SNMPv2-MIB::sysDescr.0 = STRING: FanPico-0804D Fan Controller
SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.26381
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (44213) 0:07:22.13
SNMPv2-MIB::sysContact.0 = STRING: BOFH
SNMPv2-MIB::sysName.0 = STRING: fanpico1
SNMPv2-MIB::sysLocation.0 = STRING: Earth
SNMPv2-MIB::sysServices.0 = INTEGER: 72
IF-MIB::ifNumber.0 = INTEGER: 1
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifDescr.1 = STRING: w0
IF-MIB::ifType.1 = INTEGER: 0
IF-MIB::ifMtu.1 = INTEGER: 1500
IF-MIB::ifSpeed.1 = Gauge32: 0
...

It seems need to get a Private Enterprise Number (PEN) for FanPico, so that can create a MIB that exposes fan and sensor information via SNMP....

If anyone is familiar creating SNMP MIBs, help would be gladly accepted creating a MIB for FanPico.

[tjko]

@Zitt, I created experimental MIB for FanPico that exposes same information as the web interface or MQTT.

$ snmpwalk -m +TJKO-FanPico-MIB -v1 -c public 192.168.4.170 fanpico
TJKO-FanPico-MIB::fanCount.0 = INTEGER: 8
TJKO-FanPico-MIB::fanID.1 = INTEGER: 1
TJKO-FanPico-MIB::fanID.2 = INTEGER: 2
TJKO-FanPico-MIB::fanID.3 = INTEGER: 3
TJKO-FanPico-MIB::fanID.4 = INTEGER: 4
TJKO-FanPico-MIB::fanID.5 = INTEGER: 5
TJKO-FanPico-MIB::fanID.6 = INTEGER: 6
TJKO-FanPico-MIB::fanID.7 = INTEGER: 7
TJKO-FanPico-MIB::fanID.8 = INTEGER: 8
TJKO-FanPico-MIB::fanName.1 = STRING: fan1
TJKO-FanPico-MIB::fanName.2 = STRING: fan2
TJKO-FanPico-MIB::fanName.3 = STRING: fan3
TJKO-FanPico-MIB::fanName.4 = STRING: fan4
TJKO-FanPico-MIB::fanName.5 = STRING: fan5
TJKO-FanPico-MIB::fanName.6 = STRING: fan6
TJKO-FanPico-MIB::fanName.7 = STRING: fan7
TJKO-FanPico-MIB::fanName.8 = STRING: fan8
TJKO-FanPico-MIB::fanRPM.1 = Gauge32: 1335
TJKO-FanPico-MIB::fanRPM.2 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.3 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.4 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.5 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.6 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.7 = Gauge32: 0
TJKO-FanPico-MIB::fanRPM.8 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.1 = Gauge32: 4450
TJKO-FanPico-MIB::fanFrequency.2 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.3 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.4 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.5 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.6 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.7 = Gauge32: 0
TJKO-FanPico-MIB::fanFrequency.8 = Gauge32: 0
TJKO-FanPico-MIB::fanDutyCycle.1 = Gauge32: 70
TJKO-FanPico-MIB::fanDutyCycle.2 = Gauge32: 40
TJKO-FanPico-MIB::fanDutyCycle.3 = Gauge32: 0
TJKO-FanPico-MIB::fanDutyCycle.4 = Gauge32: 0
TJKO-FanPico-MIB::fanDutyCycle.5 = Gauge32: 70
TJKO-FanPico-MIB::fanDutyCycle.6 = Gauge32: 40
TJKO-FanPico-MIB::fanDutyCycle.7 = Gauge32: 0
TJKO-FanPico-MIB::fanDutyCycle.8 = Gauge32: 0
TJKO-FanPico-MIB::mbfanCount.0 = INTEGER: 4
TJKO-FanPico-MIB::mbfanID.1 = INTEGER: 1
TJKO-FanPico-MIB::mbfanID.2 = INTEGER: 2
TJKO-FanPico-MIB::mbfanID.3 = INTEGER: 3
TJKO-FanPico-MIB::mbfanID.4 = INTEGER: 4
TJKO-FanPico-MIB::mbfanName.1 = STRING: mbfan1
TJKO-FanPico-MIB::mbfanName.2 = STRING: mbfan2
TJKO-FanPico-MIB::mbfanName.3 = STRING: mbfan3
TJKO-FanPico-MIB::mbfanName.4 = STRING: mbfan4
TJKO-FanPico-MIB::mbfanRPM.1 = Gauge32: 1335
TJKO-FanPico-MIB::mbfanRPM.2 = Gauge32: 0
TJKO-FanPico-MIB::mbfanRPM.3 = Gauge32: 0
TJKO-FanPico-MIB::mbfanRPM.4 = Gauge32: 0
TJKO-FanPico-MIB::mbfanFrequency.1 = Gauge32: 4450
TJKO-FanPico-MIB::mbfanFrequency.2 = Gauge32: 0
TJKO-FanPico-MIB::mbfanFrequency.3 = Gauge32: 0
TJKO-FanPico-MIB::mbfanFrequency.4 = Gauge32: 0
TJKO-FanPico-MIB::mbfanDutyCycle.1 = Gauge32: 70
TJKO-FanPico-MIB::mbfanDutyCycle.2 = Gauge32: 40
TJKO-FanPico-MIB::mbfanDutyCycle.3 = Gauge32: 0
TJKO-FanPico-MIB::mbfanDutyCycle.4 = Gauge32: 0
TJKO-FanPico-MIB::sensorCount.0 = INTEGER: 3
TJKO-FanPico-MIB::sensorID.1 = INTEGER: 1
TJKO-FanPico-MIB::sensorID.2 = INTEGER: 2
TJKO-FanPico-MIB::sensorID.3 = INTEGER: 3
TJKO-FanPico-MIB::sensorName.1 = STRING: sensor1
TJKO-FanPico-MIB::sensorName.2 = STRING: sensor2
TJKO-FanPico-MIB::sensorName.3 = STRING: pico_temp
TJKO-FanPico-MIB::sensorTemperature.1 = INTEGER: 24.3
TJKO-FanPico-MIB::sensorTemperature.2 = INTEGER: 23.8
TJKO-FanPico-MIB::sensorTemperature.3 = INTEGER: 33.4
TJKO-FanPico-MIB::sensorDutyCycle.1 = Gauge32: 14
TJKO-FanPico-MIB::sensorDutyCycle.2 = Gauge32: 13
TJKO-FanPico-MIB::sensorDutyCycle.3 = Gauge32: 45
TJKO-FanPico-MIB::vsensorCount.0 = INTEGER: 8
TJKO-FanPico-MIB::vsensorID.1 = INTEGER: 1
TJKO-FanPico-MIB::vsensorID.2 = INTEGER: 2
TJKO-FanPico-MIB::vsensorID.3 = INTEGER: 3
TJKO-FanPico-MIB::vsensorID.4 = INTEGER: 4
TJKO-FanPico-MIB::vsensorID.5 = INTEGER: 5
TJKO-FanPico-MIB::vsensorID.6 = INTEGER: 6
TJKO-FanPico-MIB::vsensorID.7 = INTEGER: 7
TJKO-FanPico-MIB::vsensorID.8 = INTEGER: 8
TJKO-FanPico-MIB::vsensorName.1 = STRING: vsensor1
TJKO-FanPico-MIB::vsensorName.2 = STRING: vsensor2
TJKO-FanPico-MIB::vsensorName.3 = STRING: vsensor3
TJKO-FanPico-MIB::vsensorName.4 = STRING: vsensor4
TJKO-FanPico-MIB::vsensorName.5 = STRING: vsensor5
TJKO-FanPico-MIB::vsensorName.6 = STRING: vsensor6
TJKO-FanPico-MIB::vsensorName.7 = STRING: vsensor7
TJKO-FanPico-MIB::vsensorName.8 = STRING: vsensor8
TJKO-FanPico-MIB::vsensorTemperature.1 = INTEGER: 23.8
TJKO-FanPico-MIB::vsensorTemperature.2 = INTEGER: 26.2
TJKO-FanPico-MIB::vsensorTemperature.3 = INTEGER: 23.1
TJKO-FanPico-MIB::vsensorTemperature.4 = INTEGER: .0
TJKO-FanPico-MIB::vsensorTemperature.5 = INTEGER: .0
TJKO-FanPico-MIB::vsensorTemperature.6 = INTEGER: .0
TJKO-FanPico-MIB::vsensorTemperature.7 = INTEGER: .0
TJKO-FanPico-MIB::vsensorTemperature.8 = INTEGER: .0
TJKO-FanPico-MIB::vsensorHumidity.1 = Gauge32: 26.1
TJKO-FanPico-MIB::vsensorHumidity.2 = Gauge32: 30.1
TJKO-FanPico-MIB::vsensorHumidity.3 = Gauge32: .0
TJKO-FanPico-MIB::vsensorHumidity.4 = Gauge32: .0
TJKO-FanPico-MIB::vsensorHumidity.5 = Gauge32: .0
TJKO-FanPico-MIB::vsensorHumidity.6 = Gauge32: .0
TJKO-FanPico-MIB::vsensorHumidity.7 = Gauge32: .0
TJKO-FanPico-MIB::vsensorHumidity.8 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.1 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.2 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.3 = Gauge32: 999.5
TJKO-FanPico-MIB::vsensorPressure.4 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.5 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.6 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.7 = Gauge32: .0
TJKO-FanPico-MIB::vsensorPressure.8 = Gauge32: .0
TJKO-FanPico-MIB::vsensorDutyCycle.1 = Gauge32: 13
TJKO-FanPico-MIB::vsensorDutyCycle.2 = Gauge32: 21
TJKO-FanPico-MIB::vsensorDutyCycle.3 = Gauge32: 10
TJKO-FanPico-MIB::vsensorDutyCycle.4 = Gauge32: 0
TJKO-FanPico-MIB::vsensorDutyCycle.5 = Gauge32: 0
TJKO-FanPico-MIB::vsensorDutyCycle.6 = Gauge32: 0
TJKO-FanPico-MIB::vsensorDutyCycle.7 = Gauge32: 0
TJKO-FanPico-MIB::vsensorDutyCycle.8 = Gauge32: 0
End of MIB

SNMP support is still 'work-in-progress' so changes are under "snmp" branch, including the MIB files that are under mibs/ directory.

Compiled beta firmware can be found here: https://github.com/tjko/fanpico/actions/runs/13961623071

If you want to test SNMP support, install the beta firmware and then enable SNMP Agent.
This can be done as follows:

SYS:SNMP:AGENT ON
CONF:SAVE
*RST