Reddit mentions of PoE Texas Power Over Ethernet 12 Volt 802.3af Splitters - Power Any 12 Volt Device Including IP Cameras and Compatible with Arduino (Gigabit 12 Volt 12 watt)

Take one of these and connect it to one of these and power the fan off of the PoE ports. Also, the fan I linked is a blower fan and would match nicely up against the side of the vent holes.

12V PoE power tap, $20

When buying these things, pay close attention to whether it's a real IEEE 802.3af/at device, or a ghetto not-IEEE power injector/tap (most discrete injectors/taps are not IEEE).

I've been meaning to setup the ER-Lite as my VPN server or similar for a while now. A project for a rainy day. For the time being, it just hangs out on DHCP without any real use. Even have a PoE adapter to supply it power xD

Power over ethernet. I've got an edgerouter poe-5. Works super great, was a blast to tinker with and tune. But over time I ended up getting a poe splitter to power my cable modem. A poe powered switch. One of ubiquity's long range antennas (powered by the router of course) to share internet and movie library with my parents a few blocks over. And a camera. And from ALL of those, just one wall wart for the router itself. The UPS likes it as well.

Now mind you, I never set out to become a POE addict. I just wanted a nice, powerful router but didn't feel like building a pfsense box for it. I ended up getting the powerful router but it had features for me to grow into that I didn't even know I needed when I bought it.

'That pretty much sums up my ubiquiti experience.

But I'm still kinda pissed that their management software is split between cloud keys for unifi stuff and UNMS for edge stuff.

depends how smart you're wanting.

saw some people posting this little guy : https://konnected.io/

fully "smart" replacement for a standard alarm panel.

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for regular burglar alarm, you can't go wrong with a honeywell vista20 : https://www.amazon.com/Honeywell-Vista-6160RF-Keypad-Package/dp/B00RELWDGC/

i did residential alarms for years, and used both vista and DSC equipment. they're both fine, and well made.

however, from my experience there's more accessories for the vista line, and the programming for DSC is much less intuitive.

getting an alpha keypad for your system will significantly ease programming, either way.

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you can always get a POE to 12v balun to run a "regular" doorbell cam that needs 12v power instead of POE.

https://www.amazon.com/WT-GAF-12v12w-802-3af-Splitter-Ethernet-Switches/dp/B017J8WJ5E/

do they need 12v?

Don’t send that high an amperage directly over your cables. IMO if your doubling up wires the risk is low, but it’s not worth it if something goes wrong and keeps sending current or some other weird event happens.

Instead, use a POE switch and something on the other end like https://www.amazon.com/dp/B017J8WJ5E/ref=cm_sw_r_cp_api_i_2YJACbRKGF3BE

They work great and can be modified to power all sorts of neat stuff!

WT-GAF-12v12w 802.3af Gigabit Poe Splitter with 12 Volts Output. Power Over Ethernet for Non-poe Devices Like IP Cameras to 328 Ft for PoE Switches https://www.amazon.com/dp/B017J8WJ5E/ref=cm_sw_r_cp_apap_DudR4gDFAUgyV

Bought that to turn a 12v noctura fan I have in the window on an off based on a temperature reading and a script the would shut/no shut the port... I cut the top off the adapter and spliced the power lines.

Edit: Looks like you need 12v@2a. Find an adapter that does specifically that and wire it up however you want.

Looks like a yes. First question in the Q&A on their website (I bought through amazon):

https://www.poetexas.com/collections/all-products/products/gaf-12v12w

Q I am looking for a isolated PoE splitter same features as WT-GAF-12v12w has ?

A WT-GAF-12v12w is an isolated device

Am not OP, can't speak to this particular device, but I do use some of their other products, like this guy to power my USG and have no issues with gigabit speeds.