this post was submitted on 28 Dec 2023
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homelab

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Looking at the amount of PoE splitters and how much people hate having too many power bricks, I was wondering of anybody is doing something unconventional with PoE at their homelab?

If you look at the PoE table at Wikipedia, you'll see that apart from the common 802.3af (~13W), 802.3at (25.50W), there is the beefier 802.3bt with 51W and 71.3W depending on the type. I was wondering if anybody has stories of playing with the higher power types?

The list of bookmarks

... but given how many splitters there are:

  • PoE to USB-C (data+power) - guess it'd be cool for a dumb Home Assistant tablet - everything connected with 1 cable, but it's easier to just use regular USB-C and WiFi :P Could be also used for a wifi-less weird phone server. Can also just charge your phone

  • PoE to Eth+12V - limitless possibilities. There's a guy on reddit that connected a PoE to Eth+12V splitter to power his ISP modem. The PicoPSU also takes a 12V DC plug, so you can go PoE -> PoE to 12V+Eth splitter ->PicoPsu -> some low power computer -> burn down your house

  • Did some electrical engineer finally make a PoE solution for having so many power bricks when somebody has a SFF/TinyMiniMicro cluster? Those things are big.

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[–] grue@lemmy.world 7 points 1 year ago

I would like to have some PoE smart home devices, but despite being the most obvious concept in the world (at least to my mind) I'm having an extremely hard time finding any, let alone ones without dealbreakers like proprietary cloud-dependency or excessive expense. For example:

  • There is apparently exactly one PoE motorized window shade on the market, and as far as I can tell it doesn't work without a cloud connection or in Home Assistant.

  • Why the fuck is a wESP32 $45 when a regular generic ESP32 is only $5 or less? I mean, I get why the name-brand board is expensive -- 'cause they've got R&D costs to recoup -- but why hasn't anybody in Shenzhen cloned it (or independently implemented the same idea) yet in the whopping half-decade since it came out?

Literally the only halfway-viable thing I've found is this, but even that is a clunky three-board solution that seems like it ought not to be necessary.

[–] antlion@lemmy.dbzer0.com 3 points 1 year ago

I wish there was good PoE hardware. I wish I had it for powered blinds, doorbell (real chimes), and even can lights which are now so poplar.

[–] Shadow@lemmy.ca 2 points 1 year ago

Other than aps, I use several of these in places I don't have space for a real switch (like behind my tv).

https://shop.poetexas.com/products/gbt-4-iw

Available on Amazon

[–] unsaid0415@szmer.info 2 points 1 year ago

My short unexciting story of replacing 2 power bricks with PoE:

I recently bought a D-Link DGS-1210-10P rev. B1 switch from ~2014 for $50. It has an 76W PoE power budget and supports up to PoE 802.3at (~25W).

(On the switch, OpenWrt is supported from rev. F1 - don't be stupid like me with the rev. B1)

I had some PoE-compliant devices in my homelab that I was powering with ordinary power bricks, but now that I got my switch, that had to change.

In total I was able to remove two power bricks:

  • My MikroTik RB5009 UG+S has a 802.3af PoE-in on eth1, so I removed its power brick and powered it with PoE instead
  • My UniFi AP 6 Lite supports 802.3af PoE-in, so I removed the unifi poe injector that I had and powered it directly from the switch

My homelab is rather small, so the only two remaining devices which I could swap are:

[–] evidences@lemmy.world 2 points 1 year ago

For a while I was running a "cluster" of 4 raspberry pis on POE running BOINC. Not super fun but was something to do with POE.

My original plan was to netboot all 4 and run them diskless with POE power but I never got around to setting up netboot.