Two Ways to Power a Raspberry Pi Using PoE (Power over Ethernet)

hello my name is gary sims and this is gary explains now hopefully the chance to watch my video on power over ethernet at the end of that video i promised i would make a video about two ways that you can power the raspberry pi using power over the ethernet so if you want to find out more please let me explain okay so the two ways we're going to be powering our raspberry pi 1 is using a hat hardware attached on top it's a poe hat that allows you just to plug in the ethernet with the power on it and the raspberry pi powers up and the other way is using a poe splitter okay let's start with the hat there are two types of poe hats for the raspberry pi officially from the raspberry pi foundation one is a standard poe hat so that using the first original poe standard then there is a poe plus one and the main difference between the two other than design changes of course as they've made along the way is that the poe plus one can deliver more power in fact you get up to 5 volts and 4 amps the original one is 5 volt and 2.5 amps now to use the poe hat on your raspberry pi is simplicity itself you need to have a raspberry pi model 3b plus or a raspberry pi 4. and the reason is those models include four extra pins which are used by the hat to use that power supply and it's really easy to tell whether your board supports it you just look if it's got those extra four pins on it then you're all good to go very simple to install it you just add it on top connects over the gpio pins connects over those four pins there's some little legs with screws to go in to make it all fit very nicely together and that's it you're all set to go you just plug in the ethernet with the power on it and your raspberry pi will boot up now i'm using the poe plus version which means if you use it with a poe plus uh injector at the other end or poe plus switch then you're gonna get up to five volts and four amps and of course don't forget you can use up to 1.2 amps of those across the four uh different usb ports now actually it's rated at 20 watts which is that four times five but you can actually get about 25 watts out of it so there is some extra power on the 5 volt rails on the raspberry pi itself which you could tap into if you really really wanted to now there are two main disadvantages of the poe hat the first is the gpio pins are no longer available and that's really a shame because i was thinking in my mind if i wanted to use power over ethernet the best place was i wanted to reach somewhere remotely with just the ethernet cable without having to run a mains cable there as well and of course that would be useful for things like sensors or remote cameras or for you know animal wildlife tracking or all kind of ideas that you might want to use your raspberry pi for at a distance and of course the fact is that a distance means you're probably connecting some other things to it via the gpo pins measuring humidity and temperature and so on but they're not available now there are hacks of course because there is a tiny little section of the gpo pins available you could solder on some wires there you could solder on some other kind of stuff so that was possible but it's not a neat solution which really is a shame and the second problem is that it does contain a fan which is great especially the raspberry pi 4 that helps with the cooling however that fan can be a bit noisy so that's something just to watch out for if you're using it for example in your home office now the second way is to use a poe splitter so you remember we talked about poe injectors way of getting current in to the ethernet cable and now when it comes to the other end you can split it out again so if you look at a poe splitter you've got the ethernet cable goes in at this end which actually has the power and the data then that splits into power power and data so two separate things and there's now no longer power on this ethernet cable all the power is now coming out through here and this is one with a micro usb b connector on it you can also get them with usbc and of course as you can imagine if you've now got a usb connector and an ethernet connector you just put the ethernet connector into the raspberry pi and you put in the power connector into the usb slot so here i am using on a raspberry pi model 3 and you can see that it's able to power up no problem again watch the power requirements because this is poe not poe plus then actually this one is rated at 5 volts and 2.4 amps that means it will boot a raspberry pi 4 without any problem but be careful about loading up those usb ports okay before we close why would you want to use them as i said in my previous video when you want to get your raspberry pi somewhere remote and you haven't got power but you can run an ethernet cable there then that is an ideal solution somebody wrote in one of the comments why are you doing that when your power supply is only like three meters away of course the point is you can run an ethernet cable up to 100 meters with power and data on it which means you can get it right up into a remote place and actually then use your raspberry pi there without having to run mains electricity to there as well okay that's about it my name is gary sims this is gary explains i really hope you enjoyed this video if you did please do give it a thumbs up if you want to see more raspberry pi videos let me know in the comments below about any topics you particularly want to look at also don't forget i have a twitter account at gary explains i hope you're following me there and don't forget my newsletter go to garyxplays.com type in your email address no spam just the newsletter and i think you'll enjoy it okay that's it i'll see in the next [Music] you

Channel: Gary Explains

Views: 67,384

Keywords: Gary Explains, Tech, Explanation, Tutorial, Power over Ethernet, PoE, Raspberry, PoE+, Raspberry Pi 4, Raspberry Pi 3B+, Raspberry Pi 4 Model B, Raspberry Pi 3 Model B+, Ethernet, CAT 5e, CAT 6, PoE HAT, PoE Splitter, 802.3af, IEEE 802.3at

Id: kKJA_a9Sv2Q

Length: 5min 41sec (341 seconds)

Published: Wed Sep 08 2021