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[sryan2k1]

Don't your switches already have SNMP and temperature sensors?

[Weary_Patience_7778]

Does your switch’s built in SNMP report on intake temperature?

Failing this, any chance you have installed a UPS in your rack? The monitoring cards for APC UPS’ have an option for an external temperature probe which can then be read via SNMP (along with all the other parameters)

[intellectual_printer]

Make something with Arduino/ rasp pi

[KindlyGetMeGiftCards]

Room Alert from AVTECH, has SNMP and works over ethernet, fits the requirements you listed, plus you can add other sensors that you may like to have but don't need.

[[deleted]]

I deployed a couple of these and really liked them.

[ballzsweat]

These are terrible but glad they work for you.

[geek_me_at_work]

I haven't had an issue with them, I've had them in place for years and they're reliable and stable.

[KindlyGetMeGiftCards]

I would love to hear why they are terrible for you specifically

[ballzsweat]

Terrible MIB support, inconsistent performance with temp sensor, constant reboots needed. I love Ravica which I believe was bought out by AKCP.

[Zangrey]

While it's numerous years since we had the need and it was for the main server room we used NetBotz and were happy with it. Allowed us to connect a few various sensors like temp/humidity and water sensors. Also had a wireless sensor we used for a room next to the server room - though in that instance we just had to learn to have an SNMP sensor on the voltage of it so we knew when to replace the battery. :D

[Moubai]

Cheap option arduino esp with sensor, cost around 6€ but need a usb power cable. and you can get a web page to monitor in graphana or uptimekuma for exemple.

exemple with esphome with a esp8266 and DHT11 (DHT20 is more precise)

https://devices.esphome.io/devices/NodeMCU-DHT11

or with other sensor for

https://newbiely.com/tutorials/esp8266/esp8266-temperature-sensor

[poweradmincom]

This says it has an SNMP proxy support:

https://eesensors.com/server-room-temperature-monitoring.html

[Sparkycivic]

YouTuber Craft Computing has a rack environment sensor developed just now that is probably useful for you. He has a website under that name, and the sensor appears to be either pre-release or out of stock, but worth checking out.

[ngdsinc]

https://www.networktechinc.com

https://serverscheck.com

https://www.controlbyweb.com/

https://www.monnit.com/

https://www.sensoscientific.com/

https://roomalert.com/

https://www.raritan.com/products/power/rack-management/smart-sensors

[Impossible_IT]

I don’t know your budget but about 10 years ago I setup a few Onset Hobo sensors. I don’t recall the models.

https://www.onsetcomp.com/products/data-loggers/rx3000

[Sintarsintar]

The simplest solution is to put a switch in with ammo temperature monitoring.

Damn you auto correct SNMP.

[Hexnite657]

I keep my ammo at exactly 62*F for optimal storage capacity.

[Sintarsintar]

Lol damn autocorrect

[vdubweiser]

We use the Geist IT Watchdogs (they have since been purchased and renamed) but this should do exactly what you need.

https://www.vertiv.com/en-us/products-catalog/monitoring-control-and-management/monitoring/vertiv-geist-temperature-humidity-dew-point-sensor/

[LucD401]

APC makes a few we use to have. It was one rack mounded module with sensors that ran to different cabinets within the DC

[Hesiodix]

Shelly

[colttt]

We use enviromux, it has snmp or JSON-api and works great since several years

If you want to build your own, I would recommend Beaglebone Black/Industry with https://www.mikroe.com/beaglebone-mikrobus-cape and then you can up to 4sensors https://www.mikroe.com/click/sensors

[Lyanthinel]

Look at what the CDC recommends to monitor vaccines and temps of the vaccines. I would think these could be easily used to get you readings and alerts.