Monitoring Temp and Fan Speed in a Quanta LB4M switch

I’m starting to replace the fans in my LB4M to try to quiet it down. During this process I wanted to keep an eye on my temp and the associated fan speeds to make sure I wasn’t running into a problem with cooling. Here’s my Telegraf code with the applicable OIDs.

[[inputs.snmp]]
agents = [ “192.168.1.1:161” ]
timeout = “5s”
retries = 3
version = 2
community = “something”
max_repetitions = 10
name = “QuantaSwitch”
[[inputs.snmp.field]]
name = “Temp”
oid = “1.3.6.1.4.1.4413.1.1.43.1.8.1.4.0”
[[inputs.snmp.field]]
name = “Fan Speed 1”
oid = “1.3.6.1.4.1.4413.1.1.43.1.6.1.4.0”
[[inputs.snmp.field]]
name = “Fan Speed 2”
oid = “1.3.6.1.4.1.4413.1.1.43.1.6.1.4.1”
[[inputs.snmp.field]]
name = “Fan Speed 3”
oid = “1.3.6.1.4.1.4413.1.1.43.1.6.1.4.2”

I started with pulling all 3 original fans and only installing two of the Noctua fans. The temp went from 40c to 60c before I shut it down. The Noctuas were also starting to run pretty fast. I’ve reconnected one of the original fans and now the temp is around 48c. I’m not sure if this is because the Noctuas are less efficient or if having the mixed fans is causing them to be confused about the speed. I’ll get a third Noctua soon and report my results.

The fan tray just slides out the back, so no need to open up the case. It’s super easy. This is the fan I used, and it’s a straight fit: https://www.amazon.com/gp/product/B071W93333/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1

Grafana and Chromecasting – Part 2

Following up on my previous post about running Grafana out to a Chromecast dongle on a TV, I’ve now tested it going directly to a Vizio 4k TV with the built in Chromecast functionality. Looks like it works fine and is actually pretty responsive. Unfortunately, it appears to be displaying in 1080P. I haven’t tested this much, so it might be possible to push it to 4k.

This is the tool I’m using on the server side: https://mrothenbuecher.github.io/Chromecast-Kiosk/

This opens up the possibility to use smaller, low end TVs for Grafana directly, but also for other signage or metrics displays. One reason I’ve been interested in this for a while was to run displays in a service desk/call center environment. Previously, you had to run video from dedicated PCs that would run a couple hundred dollars. With this solution you only need to buy a TV that has Chromecast built in and then run the Kiosk program on a Ubuntu VM. You can then have multiple different feeds running to different TVs.

I think the Chromecast implementation might still be a little finicky with picking a resolution, but it should be consistent across the same model of TV.

Grafana through built in Chromecast
My current layout, optimized for 1080p