#365
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3 роки томуHow should we connect devices to our home network? Wireless or wired via Ethernet? Do these new POE boards from TTGO and Olimex change anything? Interesting questions. Let’s have a closer look.
We all know: Wireless IOT devices are cool. But they have some drawbacks. This is why we want to look at the alternative: Wired IOT devices
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@bryanst.martin7134 3 роки тому
At 280k wide, its a considerable front row. Glad I caught center seat!
@AndreasSpiess 3 роки тому
:-))
@andrewpalardy8588 3 роки тому
I've used the Olimex board (ESP32-POE) for awhile and it's definitely my go-to ESP board for most projects. PoE is super handy.
@AndreasSpiess 3 роки тому
Thank you for sharing your experience!
@dg0mg 3 роки тому
6:52 min "Power over Internet" would be a great Idea! :)
@ManfredBrauchle 3 роки тому
back to the 80s when our telephones were powered from the network 🤣
@Luke-san 3 роки тому
He should patent that! Even Swiss banks will not be big enough for all the money that he will get then.
@AndreasSpiess 3 роки тому
:-)) Actually, POE is similar to the 1980s telephones with only one wire...
@daskasspatzle2396 3 роки тому
With a google account you probably get the first 15 GWh for free :-)
@newburypi 3 роки тому
@@ManfredBrauchle I think you'll find that POP (Power Over Phonelines :) was introduced in the late 1800's. The 48 volt phonelines are still in use today. However, many phones today have ancillary power that is used to power fancy displays, answering systems, and Bluetooth connected add-ons.
@waltsteinchen 3 роки тому
Hi Andreas, again a superb video, clean, straight forward explanation of the stuff we need. Since I do use the ESP32 a lot I've always considered some wired projects but was to lazy starting research for the necessary software changes. No excuse anymore ;-) I run the same rule as you: if it has some importance I use wired Ethernet whenever possible; it is often a way more "set-it-up-and-forget-it" solution than using WLAN. And - Btw, I'm not too far away of running short on IP addresses in my home Class-C network already ;-)
@AndreasSpiess 3 роки тому
So you have to switch to IP6 ;-) I still have some time for that step.
@michaelbyron9688 3 роки тому
Andreas, for me this is a very valuable video. You have saved me a lot of digging. Thank you. RE "not enough pins" another inexpensive tied in processor(ex. Arduino MIni Pro ?) can add pins if needed since power is not an issue.
@AndreasSpiess 3 роки тому
You are right, there are many ways of adding pins if you need.
@avejst 3 роки тому
Great video as always 👍😊 Thanks for sharing your experience with all of us 😊
@AndreasSpiess 3 роки тому
Thanks for watching!
@Lolatronn 3 роки тому
4:01 I have never heard a better explanation of the wiring standard differences.
@AndreasSpiess 3 роки тому
Thank you!
@AjinkyaMahajan 3 роки тому
It would be great to switch home automation on PoE for multiple reasons. Also, it will reduce the Wifi traffic a lot. Thanks Cheers ✨✌
@AndreasSpiess 3 роки тому
Yes, you are right
@TD-er 3 роки тому
Just keep in mind that the PoE standards like 802.3af and 802.3at require a minimum load of 0.44 Watt. So it isn't the "perfect solution for everything". But still the ESP32 + ethernet gives a very responsive solution. Where WiFi connections may sometimes respond for upto 100 msec (first packet after some time of no communication), an ethernet connected ESP does react a lot faster. In ESPEasy I've been using it for over 6 months now and it is a really good match, to combine an ESP with ethernet. Too bad it does take so many pins. N.B. Ali Express now also has some "slightly less expensive" ethernet cable testers that can also measure PoE standard, supplied voltages (and on what pins) and power drawn by the connected device. Still under 20 euro, so not too expensive. But a real must-have if you're working more often with PoE. N.B.2 Keep away from the really cheap PoE switches (on Chinese sites) and also read reviews on the better known brands as some brands have had a few PoE switch models/revisions that were just frying the connected devices. (yep another reason to buy such a PoE tester)
@OpenEmoto 3 роки тому
I think the ESD yellow sticker is only there to warn users of handling the product for Electrostatic Discharge, which can break electronic devices. I never saw POE devices warning about potential risk. 48v is not too risky in most scenarios (dry hands, not skin cuts).
@AndreasSpiess 3 роки тому
You are right, it was more a joke. I would expect that the POE parts are less prone to be destroyed by ESD because they have to be protected best. And I never found such a sticker on any other Chinese board.
@MartinBgelund 3 роки тому
@@AndreasSpiess While it's true that you never see ESD stickers on electronics from China, you must also be aware that much of the ESD sensitive equipment from China comes in ESD protected bags. Also, many makers warn about ESD in their videos; Bill from the DroneBot Workshop and Chris from Explaining Computers often flash their ESD protection wristbands - and I think I've also seen you use one :-) So I take this as a sign that Chinese manufacturers are now evolving, and moving up from just selling cheap stuff, to selling goods that are also having user needs and user satisfaction in mind. And that's a good thing, I think.
@quakec4233 9 місяців тому
That's what the symbol against EDS appears as! LilyGo created an affordable dev board for the public and probably envisaged people handling it like a brick in a riot. That said ESD is to be taken seriously, if you touched it and it doesn't work, then it's your fault, is what they're saying. The chip under the "sticker" is an SI3404, a PWM switching regulator responsible for converting a high voltage supply over ethernet connection to a regulated low-voltage supply, so yes if you damaged that, something could go crappy.
@useyourbrain2022 3 роки тому
Very well explained, as always! Thanks for sharing
@AndreasSpiess 3 роки тому
Glad you liked it!
@markuszingg3131 3 роки тому
Great! Left the ESP32 aside for the lackof wired ethernet! As always great video! Thank you. 😃
@AndreasSpiess 3 роки тому
You're welcome!
@PhG1961 3 роки тому
I still use Cat5e for many applications, that is, as long as I have them in stock. It depends on the purpose and very important the distance. You'll be amazed of the speed over short distances. Usually I use Cat6, also for short distances. It works quite good. Why not prepare a video with distance/speed tests. Great video btw !
@AndreasSpiess 3 роки тому
You are right, for existing projects or slower speeds they are ok. I meant with a new project: If you start to wire your home, for example.
@lal12 3 роки тому
@@AndreasSpiess for wiring my home I will use Cat 7, but for (most) IoT I would use the cheapest available mostly Cat5e. The ENC28J60 can only do 10Base-T anyway. And I use simple passive POE (or just my needed Voltage e.g. 5V) over the unneeded two pairs.
@gogomac 3 роки тому
Muchas gracias Profesor Andreas. Bendiciones, maravillosa explicación.
@AndreasSpiess 3 роки тому
You are welcome!
@tonyfleming4560 3 роки тому
Great video as usual! Thanks for your great work in every video! I wish you and your family Happy Holidays, Happy New Year and mainly great health and love in your life!
@AndreasSpiess 3 роки тому
Happy Holidays to you and your family, too!
@hcfdewet1 3 роки тому
As always; Not disappointed with the content of your videos!! I do think I'll stick to wireless for now.
@AndreasSpiess 3 роки тому
No problem. Me too for many projects. Knowing alternatives is always good for me.
@davepauljones 3 роки тому
Thanks Andreas for your work on this, I too am needing to add ethernet to my project, I purchased a Wiznet W5500, but have not done anything with it yet..
@AndreasSpiess 3 роки тому
Good choice for Ethernet. I liked the POE capability of this board because it makes cabling very simple.
@OpenEmoto 3 роки тому
Just googled about the cable categories. Plain cat6 cable can support 10G up to 55meters. So, technically cat6, cat6a and cat7 can provide 10G ethernet. Great video!
@AndreasSpiess 3 роки тому
You are right. I am not sure if this is true when they are in a tube with other cables and maybe some 50Hz power lines. CAT 5 and 6 have no shielding.
@dl8cy 3 роки тому
6:52 Power over Internet .... nice :-)
@AndreasSpiess 3 роки тому
I already made the same mistake in the POE video :-(
@JanBabiuchHall 3 роки тому
Can I download a stronger power supply for the RTX 3080 I'm never going to get?
@EagleEyeShooting 3 роки тому
Thank-you. Would like to see your breakdown on the new ESP32 T-Journal Cam. Im seeing a floating grey bar or reduced image stream when used as a Soft.AP
@AndreasSpiess 3 роки тому
I do not like these ESP cams. Not enough quality...
@jonathanlopez1542 3 роки тому
as always excellent information!!!!
@AndreasSpiess 3 роки тому
Glad you think so!
@christopherguy1217 3 роки тому
This is a good addition for the ESP32, having PoE on the board will make this very useful for stationary installations.
@AndreasSpiess 3 роки тому
Yes, definitely
@ronaldronald8819 3 роки тому
Wired is all the rage and yea it is cool.. Thanks for taking wired into account. It is in many cases the best option. I try to look at it like a engineer should and figure out what the best solution is, but i am a bit wired biased. A matter of taste, experience and training i guess.
@AndreasSpiess 3 роки тому
Quite similar here...
@scottyanke655 3 роки тому
Great intro to ethernet on the ESP32. My own experience has been that the older CAT-3 cables work perfectly well for IOT devices, because those devices don't have the processing power to utilize the faster ethernet speeds. Even ethernet chips like the Microchip ENC28J60 were fast enough for all IOT projects, and they aren't the fastest!
@AndreasSpiess 3 роки тому
You are right for IOT only. For me, Ethernet is an neutral infrastructure which has to be independent and long-term.
@leonembo6278 3 роки тому
Hi Andreas, thank you for these great instructional videos! I have a question: on which of your videos I can learn how to program this ESP32 ethernet and what software to use? I loaded your code on Arduino (Mac) but more than that I cannot progress. In the past I programmed Tasmota on Sonoff Basic using esp32 on Linux (CLI), but here I'm a bit lost. Than you in advance.
@AndreasSpiess 3 роки тому
I do not understand what you want. There are basic videos no how to start with the ESP32. Just google
@TradieTrev 3 роки тому
You can eavesdrop on a wired connection with a throwing star lan tap ;) But we should already be using SSL as you've shared in episode. #232
@AndreasSpiess 3 роки тому
So far I do not use SSL on my home network, especially not on the wired one.
@zenitzenit9053 3 роки тому
The small hand again 😍
@AndreasSpiess 3 роки тому
It lives somewhere here and appears from time-to-time ;-)
@marcdraco2189 3 роки тому
@@AndreasSpiess Like many here, I love it! It's not just the hand, it's the glove. It makes the channel that little bit unique (in addition to your excellent presentation). And I love sitting in the first row, I only wish I'd found your channel years ago, but I only started learning Arduino and MCUs about three months ago.
@katsim6799 3 роки тому
@@AndreasSpiess love that little hand!
@TDG2654 3 роки тому
All basic pre-made cables use 568b, so it's best practice to use it too. It prevents you from making mistakes if you ever put a new connector on one end of a pre-made cable. It'll probably work fine no matter what way you connect it, but it prevents a lot of confusion if you ever need to troubleshoot it. Also, cat6 is capable of 10gbps up to 50 meters
@AndreasSpiess 3 роки тому
You are right with Cat6 cables. But I would not trust it when it is inside a pipe with other cables and power lines. But I never tested.
@pd8559 3 роки тому
Ethernet cables don't need to only be used for data. You can send switch signals over Ethernet wires instead of data signaling to a remote microcontroller in your closet or wherever you're setting up your central server room or rack and poe can power anything at the switch point needing power like lighting. You can get creative with your wiring this way. At the terminating points you break out the Ethernet pins used for switching and connect them to the microcontroller GPIO to read switch states for all the switches in the various rooms on just the one microcontroller.
@murrij 3 роки тому
This is awesome. Good shielded cable and my ham shack has one less possible source of rf interference.
@AndreasSpiess 3 роки тому
True. Still a lot remaining ;-)
@smartassist9700 Рік тому
Very useful! Thank you. With Poe, are there pins to create “window sensor with magnet” and it send msg to home assistant on raspberry pi server?
@AndreasSpiess Рік тому
PoE has nothing to do with how sensors are attached to the boards.
@katsim6799 3 роки тому
Yes, worth creating poe boards. Use in security projects to keep them from air hackers. Definitely worth it to keep peepers from accessing an esp32 cam or even wifi door lock.
@AndreasSpiess 3 роки тому
A Wi-Fi door lock is probably not a goood idea, I agree...
@JackDaniels-hf5ug 3 роки тому
Thanks for a nice video. Btw, that sticker is not a danger label for your safety as 50V will not kill you but a warning that the device may be damaged due to ESD (electro-static discharge), i.e. the manufacturer can always claim ESD damage bcs mishandling. Honestly, all bare bone electronics are susceptible to ESD so I understand them. It is also very difficult to prove ESD damage.
@AndreasSpiess 3 роки тому
I know the meaning of the sticker. It should have been a joke because this was the first such sticker on a Chinese board. And in an area which has to be quite good protected...
@f1r370 3 роки тому
11:50 Andreas, I would disagree with your statements we should invest in Cat7 cables for new projects. Controllers like ESP32 wound never go above 100mbps (maybe someday 1gbps). For that Cat5 is more than enough (Including PoE). Cat7 is 2-3times more expensive and harder to work with (because of thick shielded cables) than Cat5/6
@AndreasSpiess 3 роки тому
You are right. In my world, Ethernet cabling is done without a purpose in mind, just as an infrastructure. Of course you do not need Cat7 for this ESP32.
@mariuszkrzanowski 3 роки тому
In my opinion even the 1MBit ethernet for temperature reading or swithing lights on/off is overkill. The truth is that we do not know the future, so the real question is. Is better to invest on the begining or destroy walls later?
@brandonallen2372 3 роки тому
Cat7 also isn't recognized as an official standard by the TIA/EIA.
@tinygriffy 3 роки тому
When i look into ebay for example I see a 25% price difference between cat 5 (40€ for 100m) and 7 (50€ for 100m) cable not 200 - 300 % , why do you say such a thing ? It's just not true. Harder to work with because of the thickness, really ?? Sorry Sir, but that's ridiculous. You get almost double the copper plus shielding which may be good for the next 25 Years of Data transportation and you still find something to complain about ... whau !
@f1r370 3 роки тому
Hey, @@tinygriffy It's not about the complaint. The idea of the comment sections is for everyone to express their opinion/share their experience, so you have another point of view on the topic. And I see you're getting emotional, but please get some practice in structure cabling before claiming something is ridiculous. The price of the cable should accommodate for a lot of variables. There are cheap and expensive cables out there. There are CCA (copper covered aluminium), CU (solid copper), then there's thickness of shielding foil, is there braided shielding or not, etc. Then we're moving on to RJ45 plugs and jacks. Cat6A's are MUCH more expensive than Cat5. They take longer to crimp/assemble and they're generally hardER to work with. You don't believe me, take a look at this: ukposts.info/have/v-deo/nmKTfYKqnatpr4E.html ukposts.info/have/v-deo/mYalg6OpjIJ2k6s.html
@Freestila 3 роки тому
I use some ESP (both types) for various home automation things - sensors etc. I use a cat5e cable for power delivery, poe config on the cable, with 12 volt currently (maybe i add / increase to 24v later). I only use a standard buck converter to go down to 5v for the esp, with of course the option to sue the original 12v for motors if needed. I could use standard ethernet when needed, or any bus protocol on fewer wires (which was my original idea), but the esp are way simplier. I plan to add a dedicated "Node" wifi network somewhat in the future for these, isolated from most of my normal network (except the Home assistant server of course) and no internet connection. But for now, the default wifi does the job. I never intent to use this cables for high speed transmissions (i have a normal cat 7 network for that), and cat5e is enough for even standard video cams. So in my opinion, this is a budget friendly diy solution (which also lets me experiment on power over cat and other things :) ) Sometimes the custom diy is better just because of the fun doing it and the stuff you learn :)
@AndreasSpiess 3 роки тому
Thank you for sharing your experience!
@Simone-mk1qu 3 роки тому
I've tried every board that involves esp32 and Poe for my company. The olimex boards are crappy and totally unreliable: many of them comes from factory faulty and they are very sensitive to ESD discharges (also the esp32-poe-iso). The ttgo boards are okay but only for hobby projects, as you pointed out too many pins were used and the board becomes pretty useless. The best one that actually is available on the market is the wEsp32 from silicognition, yeah, is more expensive, but affordable, totally isolated and it can provide up to 13W from the Poe step down converter on board
@f1r370 3 роки тому
Hi Simone, could you elaborate on "crappy". I'm planning to base my home automation on ESP32-ISO from Olimex. So far I've bought only 2 boards and I'm quite happy with them? What kind of troubles should I expect?
@Simone-mk1qu 3 роки тому
@@f1r370 hi plamen's, I've tried to use them in industrial environment (esp32-poe) with my own rs485 iso converter, we have seen that the PCB layout is very compact and optimized, but the Poe step down converter develops a lot of heat that will affect the ripple on the power lines (that reaches high values on long term power up) This, for us, was only one of the biggest problems, also, the pcb layout of the ethernet module is not optimized and it will result in non stable ethernet transfer speeds/stability: comparing 10 boards, we have seen that there is up to 25% of difference between speed of boards. Another big issue that has the esp32-poe and esp32-poe-iso, is the ethernet enable/reset management: is poorly implemented and sometimes (during reboot/power up/working) the ethernet shuts down without any apparent reason. I mean, for a home project they will be okay, but in a real world business scenario they are totally unreliable.
@AndreasSpiess 3 роки тому
Thanks for adding your information.
@akda5id 3 роки тому
Thanks very much for the rec of wEsp32, it looks like a well designed board.
@SchmurtzAlex 3 роки тому
Thanks Simone, did you test this one too ? www.cnx-software.com/2020/11/09/6-wt32-eth01-is-a-tiny-esp32-board-with-ethernet/
@paulb36utube 3 роки тому
Great video as usual. Thank you. You mentioned that you prefer wired for the PC. Any chance of a video on how you can use 2 pro micro/Leonardo’s for 2 game controllers. Having a hard time getting 2 boards to be recognised as they both seen as micro/ Leonardo. Another challenge for you?
@AndreasSpiess 3 роки тому
I never tried two boards together. But this topic is not for a video. Too special.
@dksmar 3 роки тому
Very nice video! One question. I have a microtik switch that gives passive poe not the standard 48V. Will the ttgo board will work?
@AndreasSpiess 3 роки тому
It should if the voltage is around 30 volts. But I do not remember where I read it.
@jofie2302 3 роки тому
Perhaps one of the best use cases for wired (at this point) is for security-related devices, like door sensors, security cameras and such. WiFi based devices can be easily disabled with a readily available WiFi blocker/jammer. Big drawback of wire is the needed infrastructure - a router that supports POE, and ethernet cables all over the place. A compromise could be a powerline adapter that piggybacks ethernet on the (existing) mains wiring, and that has POE. You then only need an ethernet cable from the closest power outlet.
@AndreasSpiess 3 роки тому
I agree with your comment about locks etc. POE routers are of course more expensive. But very handy...
@rigfix 3 роки тому
Thanks for a great video :) Do you know if OTA will work together with this ?
@AndreasSpiess 3 роки тому
It seems they have a Tasmota version for it. So I assume it also will do "OTA".
@ChetSpencer 3 роки тому
Was that Node Red you were using in the video? Thank you for sharing on your very informative channel :)
@AndreasSpiess 3 роки тому
Yes, node-red. There are other videos where I use it.
@ChetSpencer 3 роки тому
@@AndreasSpiess since you are familiar with graphical programming, I highly recommend checking out Flowcode a visual Flowcharting programming language for a variety of micro controllers including Arduino
@giordanogobbo 3 роки тому
Very good video as always! Very good topic , i also searched a lot a way to use ethernet for my smart home and esp32 iot devices, unfortunately in my opinion esp32+ ethernet is not very common (yet) , therefore is still too difficult to gather information and find cheap and good hardware ! Maybe it will change! Fingers crossed ;)
@AndreasSpiess 3 роки тому
Fingers crossed!
@RandomDude-ni3vt 3 роки тому
One problem I encountered often when crimping network cables: Poor quality cables have conductors made from copper coated aluminum (CCA). I never was able to make cable that properly worked at 1 gigabit (100M worked, though). Once I switched to real copper cables, every single cable worked at 1Gbit, so I really think the CCA is to blame. Unfortunately it can be difficult to tell if it is real copper or CCA. I only realized after looking at the cut cable under a microscope. I will never again buy cable that does not have a propper data sheet! Also, thanks for kind of promoting the ESP's LAN interface! I also think that wired is in many cases preferable over wireless and I hope the support in the community for this will grow. Recently I wanted to upgrade my 3D-printer's webcam to LAN. Only when the ordered network PCB arrived, I realized that the camera interface and the LAN interface share pins. And, if i saw it correctly, at least some of these can't be assigned freely. So no LAN and camera interface at the same time... Or does anyone know a way out?
@AndreasSpiess 3 роки тому
Thank you for sharing your experience with non copper cables.
@RandomDude-ni3vt 3 роки тому
@@AndreasSpiess I am glad i can contribute something. I guess the most important thing is to be aware of such cables and not buy them. Unfortunately many sellers on ebay advertise them as CCA Copper. Acually more than just an euphemism for aluminium with a few microns copper on it... BTW. I ordered my bad cable from a well established reseller that mostly has a good reputation and existed alrady long before ebay...
@jamesmichener7526 3 роки тому
Your advice of getting a Ethernet cable tester is IMPORTANT. It is a must if you build and crimp your own cables, but beware that my experience is that about 5% of store bought cables can have problems. It is also amazing how many errors in wiring can go undetected in use, as Ethernet will drop speed down to establish a connection. There are wiring errors that can cause a 'bad day'. A tester is money well spent. Highly recommended.
@AndreasSpiess 3 роки тому
Thank you for supporting me ;-) We probably have the same experience.
@ShALLaX 3 роки тому
Careful with the generalisations here. Cat 7 has shielding and metal plugs that must usually be grounded on both ends. If not, it has the potential to act as a big antenna and interfere with the signal. I’ve seen long runs of ungrounded cat 7 that ended up not being able to carry a signal at all. Also, is cat 7 really necessary for these boards, which presumably don’t support fast throughput? Cat 7 is chunky, so maybe going with a thinner cat 5 or 5e cable would be better for portability/ installation considering the performance wouldn’t be degraded? PoE has several standards, 24v for passive, 48v for 802.3af, at, and bt.
@AndreasSpiess 3 роки тому
1. For me, Ethernet is an infrastructure which is not only used for ESP32 projects... 2. I covered the topic of POE standards in my POE video I mentioned in this video.
@wouladjecabrelwen1006 3 роки тому
wow this sweet guy with accent mentioned my country amazing 40 years ago in CAMEROON for the red cross......... i am seating at the first row first column
@AndreasSpiess 3 роки тому
I lived in Kousseri because of the war in N'Djamena
@giorgioboiero 3 роки тому
Andreas, could be possible to use Eth and Wifi at the same time? A practical example is a Eth network analyzer which is controlled by a remote smartphone/tablet connected to the ESP32 as a Wifi access point
@AndreasSpiess 3 роки тому
I assume it will work because Olimex names one of their boards "Gateway". But I did not try and also do not know how to do it.
@PatrickVanOosterwijck 3 роки тому
I ran the Espressif Ethernet / WiFi bridge code on my wESP32 and it seemed to work: www.crowdsupply.com/silicognition/wesp32/updates/ethernet-to-wifi-bridge-demo-code
@AndreasSpiess 3 роки тому
It looks it uses the IDF and not Arduino :-(
@peut 3 роки тому
Also, ipv6 does not seem to work on Ethernet with the current Arduino ESP32 software. Not important for most, but good to know maybe.
@AndreasSpiess 3 роки тому
Thank you for the info. I never tried ipv6 so far.
@RidingTheAlps15 3 роки тому
IPv6 should work on ESP32 but it seems a bit special to get it working. techtutorialsx.com/2019/10/02/esp32-soft-ap-enabling-ipv6-support/
@yahmk3978 3 роки тому
Thank you!
@AndreasSpiess 3 роки тому
You're welcome!
@alomuc 3 роки тому
Hi Andreas, thanks for your great videos, did you drop the numbering of videos some time ago? This was a great help for referring and I‘m missing it. Ciao aus München, Andreas
@AndreasSpiess 3 роки тому
Always the last about 10 videos doe not carry numbers.
@AndyShrimpton-GaaTech 3 роки тому
Question. If you have say a Pi3 working on WiFi. If you plug an esp board with ethernet as shown in the video into the pi would they be able to talk to one another across the wired connection
@AndreasSpiess 3 роки тому
Yes. The Pi connects automatically to the Ethernet network if a "valid" cable is plugged in.
@bfx8185 3 роки тому
Nice summarize, thx.
@AndreasSpiess 3 роки тому
Glad it was helpful!
@varmint243davev7 3 роки тому
Standards exist for a reason, it is best to follow them. I suggest sticking with B when doing your cables and jacks. A is for legacy telco. For Home and small business level gear you generally wont need an x-over anymore. On enterprise gear that may not be the case. YMMV
@AndreasSpiess 3 роки тому
You are right.
@E3CB 3 роки тому
Thank you! Is it possible to connect OLED screen or e-paper to it?
@AndreasSpiess 3 роки тому
Maybe, if they do not need too many pins.
@tablatronix 3 роки тому
hah I just bought a LAN8720 and a ENC28J60 eth modules, good timing, came across the olimex boards when I was searching, poe ones look like they will be handy
@AndreasSpiess 3 роки тому
POE makes the difference for me...
@TomaszDurlej 3 роки тому
Youre rule of thumb is very good, for you and anyone else. Radio waves pollution is starting to be problematic, especially in big cities. I’m very disappointed of Ethernet over HDMI don’t succeed, it’s great for our “smart” home cinema.
@AndreasSpiess 3 роки тому
Many technical standards are not used after a few years. this is why I like Ethernet...
@Njihtram 3 роки тому
Hi, Very helpfull video, would like to try this board. :) I'm looking for the UART pins, only 16 (U2RXD) seems to be in the 12 pin port? No TX? Do you know if it's possible to use UART combined with the ethernet port? Thanks!
@AndreasSpiess 3 роки тому
You can chose nearly any pin for a UART. I recently made a video about the ESP32 pins.
@Njihtram 3 роки тому
@@AndreasSpiess thanks! I'll take a look when the board arrive. Really appreciate your helpful videos :)
@MatSmithLondon 3 роки тому
Hello Andreas, this subject is very important to me as I build my own home and design my own multisensors. I tried the Olimex, it is quite expensive but unfortunately it did not function well (intermittent issues, difficult to describe). The TTGO seems very annoying! It's too big for in-ceiling sensors, and the features are all wrong. I don't need SD cards, the board spacing doesn't look efficient, and why include a USB-C socket if it only provides power? (A CH340 is sooo cheap now and small as well)... my quest continues! I have been thinking about trying to make my own board for a long time now, like Freetronics but for ESP32 and more "barebones" (small as possible). My end goal is cylindrical multisensors that can be installed into ceilings. 3D printed of course. I think for now I will continue to use Arduino Nano, W5100 breakout, buck converter and PoE injection for this application! Anyway great video, I always enjoy watching your presentations.
@AndreasSpiess 3 роки тому
Maybe somebody will create such a board if the future when Ethernet becomes more popular...
@MatSmithLondon 3 роки тому
@@AndreasSpiess I have just seen the WT32-ETH01. It is *not* PoE, but does look interesting because it does have a lot of the features I am looking for: minimally small and ethernet!
@mystereit73 3 роки тому
Wunderbar. Merci !
@AndreasSpiess 3 роки тому
Gern geschehen!
@chriskroon649 3 роки тому
This sounds really nice. My first thoughts was to create a "esp-now" router/gateway. esp-now on wifi and the connection to mqtt for the messages over ethernet. Is this possible? This could enable a lot of possibilities for IoT.
@AndreasSpiess 3 роки тому
You have to check. I did not try it.
@TecSanento 2 роки тому
We have been using the w5500 spi Ethernet shield using the esp on a wired connection that uses only 1 Pin besides spi :))
@AndreasSpiess 2 роки тому
:-)
@JendaLinda 3 роки тому
I'm still using CAT5E. Gigabit ethernet is good enough for most applications. Also 10Gbit equipment is too expensive. CAT7 is not standardised by TIA/EIA and it's difficult to crimp properly. For future proofing, I would go with CAT6A.
@AndreasSpiess 3 роки тому
1Gbps is no problem also for me. But if I would cable my house now I would go for Cat7. You can go with shielded 6a which is very similar, I think.
@tamazerd 3 роки тому
@@AndreasSpiess The Cat7 standard requires special connectors, GG45, TERA or ARJ45. Only the GG45 is backwards compatible and "downgrades" to Cat6a standard if used as a regular 8P8C connector. No normal RJ45 8P8C is Cat7 rated. The Cat7 standard was set in 2002 and basically got obsolete before it was widely adopted i can guarantee nothing in your home have Cat7 connectors, so it will always downgrade to Cat6A. Therefore Cat6A is what you want to install for 10Gbit, or CAT8.1 if you want to go all the way and still use normal RJ45 8P8C connectors, but 8.1 is only rated for 36m and intended for short runs in data centers.
@cheaterman49 3 роки тому
2:52 Hahaha, old school - I only learned about modbus from working with actual industrial equipment. The good thing there (and likely not a coincidence, I suspect people had the exact same train of thought as you did) is that modbus is also available over TCP :-)
@AndreasSpiess 3 роки тому
I did not speak of "modbus" as a protocol here. I talked about the cabling, I think.
@cheaterman49 3 роки тому
@@AndreasSpiess You are right, you didn't mention it by name, but you did show it on screen alongside RS485 when you said "a few years ago I would probably have thought about using such a bus for my home" :-) To be fair most IoT devices use TCP/IP, it would be impractical for most people to route separate RS485 wiring or to have a modbus server on their local network nowadays :-)
@markmaker2488 3 роки тому
I’ve been using olimex poe boards but have found the boards do get quite warm while powered by poe.
@AndreasSpiess 3 роки тому
Good to know!
@user-vn7ce5ig1z 3 роки тому
• 1:50 - Wireless also has the downside of poor (compared to wired) reliability/stability, e.g., disconnections. Really, the only downsides of wired are the inconvenience and slightly higher cost (for the wires). • There doesn't currently seem to be a proper standard for Ethernet/WiFi libraries yet, so you could have all kinds of issues getting it to work depending on the library/libraries used. 😕 I experienced a very specific bug trying to use a wired connection with an Arduino (it was either the EtherShield or EtherCard library), and ended up switching to WiFi instead.
@AndreasSpiess 3 роки тому
I think I mentioned that this technology is new to the Arduino/ESP32 community. So we will see if we find a lot of problems...
@matthewmalpeli Рік тому
I'm considering starting a new project that turns a 4mb WROVER ESP32 into a Squeezebox network music receiver, but your struggles with getting BLE to work alongside ethernet has given me reason to pause and reconsider. I was planning to pair it with a waterproof Bluetooth speaker that will hang off the shower faucet. Was it only BLE that was affected or legacy Bluetooth devices too? Something tells me that pulling out a digital audio signal with so few connectors left available will be a bridge too far... Add a DAC to that shipping list and it doesn't look nearly as cost effective as a WROVER and JBL Clip Speaker does...
@AndreasSpiess Рік тому
Maybe you watch my video about ESP32 audio. There you should find an answer.
@matthewmalpeli Рік тому
@@AndreasSpiess Congratulations! You are my new spirit animal 🤭 I wonder how difficult it would be to use an ESP32 as an audio spectrum analyser that could, with an attached microphone, act as a substitute for your smartphone when generating and sending music mode led instructions to network connected smart lights. I recently hosted a children's birthday party during which I had intended to use my music mode enabled lights when music was playing. The problem with that is the necessity of keeping the app running in the foreground of your smartphone with no other apps attempting to connect to the microphone. Try maintaining that when you've got half of all the parents calling you for directions while you're trying to capture moments with your phone's camera. Whoever designed these capabilities has clearly never had to cope that PLUS 15 8-year-olds hopped up on sugar coated almonds 😱
@AndreasSpiess Рік тому
@@matthewmalpeli Maybe your next project? Google finds an audio spectrum analyzer project for your ESP32...
@JMTosses 3 роки тому
I've been waiting for this, thank you very much! Not if I ever asked this but are you aware of any "Power LAN" enabled IoT devices? Something of the size of a Shelly1 that could be dropped behind wall mounted switches or similar applications? I know "Power LAN" may lead to signal issues and can be slow and unreliable but once working it should offer plenty of bandwidth for IoT usage. I would rather use such devices than dripping wireless devices into the walls. Not sure how easy it would be to hack "Power LAN" connected devices but the currently deployed solutions I know to be lacking severely in terms of security. Anyways - love your show - it's gotten better and better over the years. Thank you very much for keeping at it! Cheers!
@AndreasSpiess 3 роки тому
I think this is a different story and so far I never heard of such projects.
@JMTosses 3 роки тому
@@AndreasSpiess Me neither but I haven't been on top of any such research for quite some time now. I did find a few one or two modules that connected to a PowerLAN like infrastructure for industrial applications. Those were very expensive, usually very bulky and did not even offered Arduino grade computing or IO. They usually only provided an interface but not for example IO plus DC power output plus esp level computing in a small module which most home automation enthusiasts are currently looking for. Anyways - thank you for your quick response. I hope someone will take on the task in the future as I have been looking for such a device for years now and nothing usable ever showed up. Cheers!
@RC-EJ 3 роки тому
Stability of the (wired) data connection is very important for (critical) monitoring appliances. (I mis the stability aspect in the argumentation. ) So when stability is important for your non mobile solution, a wired connection has preference. Don’t flip a coin but nowadays always pick T-568b; it’s the current industry “choice”. Questions I have: 1) what are the experiences with current version of ESPhome and the support of wired modules (which ones are the best), 2) can a wired network interface be added to the wireless ESP32 and which hardware interfaces are supported, 3) what are the costs? Thx. Andreas for all your great work!
@AndreasSpiess 3 роки тому
1. I assume the frameworks do not (yet) support Ethernet. But you have to check. Maybe you find a fork. 2. I mentioned that I did not try wired and wireless together. So I do not know. I Assume all interfaces using the same chips are supported. Pay attention: Some boards do not have POE functionality.
@patrickmaartense7772 3 роки тому
love them already !
@AndreasSpiess 3 роки тому
:-)
@patrickmaartense7772 3 роки тому
@@AndreasSpiess perfect for my flightsim project, im sure, no more power cable but just use the existing POE switch thats already powering other devices, Will try to see if I can also get other devices powered from the POE on these devices, I guess leds and the such can be use way better as more power is available
@skopyhoTechChannel 3 роки тому
Hello Andreas, Could you please measure increase od power consumption of your router after connecting ESP based ethernet device? Few years ago I considered about building smarthome system on arduinos and ENC28J60 but I did not do it because these ethernet chips had high power consumption. At these days ESP8266 on wifi with deep sleep result in much lower consumption. With tens of connected devices every watt will be noticible on electricity bill.
@AndreasSpiess 3 роки тому
It is not easy to measure this current and I do not care too much :-(
@mahudson3547 3 роки тому
I have been crossing the PITA wires in my cables for ever. And now I learn it isn’t necessary. Thank you!
@AndreasSpiess 3 роки тому
At least as far as I know.
@AndreasDelleske 3 роки тому
@@AndreasSpiess yep it’s true. Switches without MDI have not been made anymore since 100 Mbit/s got on its way. I don’t even know a single case when connecting two non-switches (modem to router) need it anymore.
@zeberto1986 3 роки тому
If you look at the material for Cisco certification they will still tell you when to use cross over or straight through cable even if it’s not been needed for years. Handy to know though when dealing with legacy kit.
@L-36 3 роки тому
ESD stands for Electro Static Discharge and means the board is static sensitive. Means you should wear a grounding strap and work on an ESD matt or you might burn out the board.
@AndreasSpiess 3 роки тому
You are of course right. It was meant as a joke. This is the first Chinese board I got with such a sticker. And the sticker was placed in an area where I think the ESD should be not a big problem. All other pins are probably more critical...
@L-36 3 роки тому
@@AndreasSpiess :-)
@peter.stimpel 3 роки тому
Nice. Did you check how much power such boards can deliver to sensors, when powered by PoE? It would be very handy to power the whole sensor solution from that, not just the board.
@AndreasSpiess 3 роки тому
They specify 1.2A@3.3V. I stopped at 1.5A and it was still at 3.3 volts. So no problem for sensors of any kind, I think.
@peter.stimpel 3 роки тому
@@AndreasSpiess sounds good, thank you. Really have to think about this PoE stuff, again.
@TD-er 3 роки тому
It also depends on the used switch. For 802.3af (POE) and 802.3at (POE+) the device "negotiates" with the switch how much power it can draw. The minimum (!!!) of all profiles is 0.44 Watt and depending on the switch it may be able to deliver upto 15 Watt for POE and 30 Watt for POE+ (some even more) But your switch still needs to have the power budget available. If you look at most switches with 4 PoE ports, you will see they have a power supply which is a little less than 60 Watt, so it cannot deliver 4x 15 Watt. Meaning a requested power profile may be denied by the switch. And this rejection may even occur way before the expected 15 Watt on a lot of switches. For typical ESP32 like use cases almost all PoE switches may work just fine and you won't see any strange things happening, except for those really cheap no-name PoE switches. (don't use them for more than 1 or 2 ESP like devices, really don't!)
@DmitriyKhazansky 3 роки тому
I think this has great potential. I’ve always wanted POE powered IOT devices. Now I just pass 24v over Ethernet cables to my devices for power only. The “cost” of 8 pins is too much, maybe Expressif will build it into the next chip. Also, I’ve heard of complications with Bluetooth and Ethernet, that needs to be resolved.
@AndreasSpiess 3 роки тому
Ethernet is already built-in into the ESP32 chip :-)
@McTroyd 3 роки тому
Nothing beats the reliability and simplicity of a cable! I'm not so sure about power consumption though... you're going from solar and battery (on your other projects) to grid power. Definitely good for reliability, but what about the electric bill?
@AndreasSpiess 3 роки тому
I do not think you will see it on the electric bill. A battery also costs money...
@McTroyd 3 роки тому
@@AndreasSpiess True that. Potentially lower maintenance that way too, especially for sensors that run 24/7.
@soumynonareverse7807 3 роки тому
Great video. I was already interested in the TTGO wESP32 now I am even more interested. Could you show us a setup for remote lights using wired connections (no fancy colored stuff like Philips Hue) that can be integrated into Home Assistant? For a while now, I've been searching for smartlights that can be connected through ethernet. As they don't exist yet, I hope this can be done using the TTGO ESP32. Could you give us an example of this project and how to achieve that?
@AndreasSpiess 3 роки тому
Maybe an interesting project... It should be possible, but probably not on this channel.
@soumynonareverse7807 3 роки тому
@@AndreasSpiess why not? Do you atleast know what I should search for to come closer to the solution of this project?
@AndreasSpiess 3 роки тому
I would cut it into parts and search solutions for each part.
@soumynonareverse7807 3 роки тому
@@AndreasSpiess you mean search for a wireless project and than search for a way to make if wired?
@saxpert 3 роки тому
Bei dem POE Video letztes Jahr hast du aber eine andere Stimme gehabt....warst erkältet? Ich habe letztes Jahr versucht einen rpi3b+ mit cat7 Kabeln über Poe zu versorgen für eine OGN Station. Der Splitter mit 5V Micro USB Ausgang auf der rpi Seite hat aber soviel HF noise produziert, dass ich das wieder gelassen habe. Es kommt also immer drauf an, was man vorhat VG
@AndreasSpiess 3 роки тому
Ja, das ist ein bekanntes Problem. Insbesondere wenn die Distanzen zur Antenne klein sind.
@TheEmbeddedHobbyist 3 роки тому
Nice thought provoking video again. I can only see the point of this if you can use the Wi-Fi at the same time as the Ethernet maybe for adding an access point, etc. If a network connection is easy to access, then why start the project with a Wi-Fi embedded chip. There are a lot more faster chips out there, with more I/O.
@AndreasSpiess 3 роки тому
I know of people who do not trust Wi-Fi. So they might like this board.
@leonembo6278 3 роки тому
When flashing this the power is given by the CH340C or the main board requires power as well?
@AndreasSpiess 3 роки тому
I do not understand your question
@leonembo6278 3 роки тому
@@AndreasSpiess Andreas thank you. The TTGO goes with its own additional board (CH340C) for flashing. This interface has already two usb, one mini and one C. From the various picture on internet, even on the official lilygo webpage sometimes the interface is connected from the bottom of the main board, sometimes from the top, but of course depending on the side you plug it in the pins will be inverting. In addition to this there is the usb port on the main board. My question was if it's needed to power the main board or it will take power from the interface. I searched documentation but I didn't find anything, also in your video you didn't show this connection details. Before 'cooking' one or both boards I was looking to hints and explanations.
@AndreasSpiess 3 роки тому
Most boards are powered with the USB programming cable.
@laboratoriodiroboticaemecc7978 Рік тому
Hi Andreas. Recently I've purchased an "AZDelivery Adattatore Seriale FT232RL da USB a TTL per 3,3V e 5V compatibile con Arduino". In your opinion, may I use it to program the LILYGO TTGO T Internet POE ESP32 WROOM LAN 8720A ? Thanks in advance.
@AndreasSpiess Рік тому
I thought you can program this board using the USB connector (as most other ESP32 boards).
@UpcycleElectronics 3 роки тому
The cheapest test tool requires an additional ground connection between the transmitter and receiver. This could be as simple as a wire shoved in between the enclosure and test connector. The connectors have a shielding can connected to ground. Also, the RJ45 connectors with connector wire pass through will save a lot of time and headaches.
@AndreasSpiess 3 роки тому
You are right. I recently bought a pack of such connectors...
@UpcycleElectronics 3 роки тому
@@AndreasSpiess I have an unrelated question for you. What resources do you know of for finding obscure part documentation? I'm searching for 2 mystery electro mechanical parts that are made by either Foxconn or Hosiden. I know they are used in multiple Nintendo products and are widely available from Shenzhen direct suppliers, but no one lists part numbers. I've looked through dozens of listings, and sent documentation request messages but still waiting on replies. I've searched Mouser Digikey, and Arrow, but they don't have any matches. I would really like to have a datasheet for all parts in my current reverse engineering project, but the USB-C receptacle and a through-board side-mounted momentary push button are crushing my hopes and dreams right now. I think I need to learn what the Asian supply chain is like. I know about LCSC but they seem to target western hobbyists, and didn't have anything. What is the equivalent to Digikey and Mouser in Taiwan, China, and Japan? Any ideas?
@AndreasSpiess 3 роки тому
I only use Google for my research. Often I find links to other sites in some comments in forums or so.
@keithroberts5946 3 роки тому
I remember having to support an office with BNC ethernet - bus based ethernet - Coax cables to and from every computer joined with BNC T pieces and terminators at every end Lots of fun when any connection came loose as whole network went down (people kicking cables under desks) Twisted pair cables in star configuration so much easier to fault find Things have improved in 25 years
@AndreasSpiess 3 роки тому
My first VAXstation also used coax cables in Daisy chain configuration...
@kitecattestecke2303 3 роки тому
IoT accespoint possible? Maybe it is possible to create a wifi with high channel number to stay away from the average home wifi and create a swarm of small Sensor nodes?
@AndreasSpiess 3 роки тому
I do not think this will be legal
@ed-jf3xh 3 роки тому
Been using 485 and 422 for years. Very hardy. Top out around 10Mbs but for most things, it's perfectly fine.
@AndreasSpiess 3 роки тому
It is a good standard and widely used. For the future I find Ethernet more flexible.
@largepimping 3 роки тому
Andreas, the way you worded the part about "crossing" the wires in an ethernet cable may cause some confusion... it's true that you no longer have to create or use *crossover cables* these days because every NIC, switch, hub, etc. is able to negotiate and handle that automatically (unless it was made [probably] 10+ years ago). But when you're crimping your own RJ-45 connections to make a patch cable, the orange or green (depending on whether you're using 568A or B) wires need to "surround" the two blue wires in the middle - meaning all the pairs can't just be wired "straight through." You have to unwind the green (or orange) pair and bring one wire (in effect) across the blue pair, and I can see where people might think of that as "crossing" those wires... and this is where the confusion may come from. However, your info about picking 568A or B and always being consistent for both ends of a given cable is spot-on. So as long as people pick one or the other and follow the standard, they'll be fine.
@AndreasSpiess 3 роки тому
Sorry for the confusion. I think most people do it like me and look at a drawing when the insert the wires...
@cakeforcat 3 роки тому
I'm almost sure the connectors you have are 8P8C which are usually confused with RJ45, but feel free to correct me
@AndreasSpiess 3 роки тому
RJ45 is a specific implementation of 8P8C. You find also 8P8C connectors for other applications like serial connectors. So 8P8C is too general
@Palominostudio 3 роки тому
Nice topic, there is still a place for copper. I tried the usb to RJ45 extenders today, got 60 meters out of it which is 10 meters past the spec on the packaging. Not bad for 10 dollars. it does mean 5V needed on the far end, but still very useful for getting usb to a far place. Kind regards, Duncan, South Africa
@AndreasSpiess 3 роки тому
Very good. I recently got a 20 meter USB extender for my satellite project. So far it also worked. I di not know you get such USB to RJ45 extenders.
@vk3fbab 3 роки тому
Just some extra information. Cat 6 is capable of 10G for channel lengths of 30M or less. You'll find you can probably get further with good Ethernet chipsets. The silicon gets better as time goes on and it can mean that it does better than the minimum spec. The other thing to note is that Cat 6A and above are getting harder to terminate. The requirements for cross talk both near and far mean you need to untwist and unsheath the absolute minimum amount of cable. The other issue with the newer standards is alien crosstalk which comes from other Ethernet cables nearby. You get this is larger commercial installs. Modern Ethernet is like laying RF cables. The signals are in UHF and propagate on the skin of the conductors and can be induced in nearby cables. With the price of CAT 6A and above fibre becomes a really compelling option but no support for POE. I purchased 100M of single mode preterminared indoor cable for 60AUD that is about the cost of CAT6 here. Some cheap media convertors and there is a really safe, reliable and cheap way to connect two buildings together.
@AndreasSpiess 3 роки тому
You are right with Cat6, but, as you write, I do not like unshielded cables if more than one is in one tube... Concerning non-POE: I would miss this function because it solves some cabling issues...
@AmauryJacquot 3 роки тому
on ESP32, hardware resources such as I2C are not directly connected to a particular set of pins, but go through a cross-connection system, so you still get hardware i2c support, even when moving it to other pins such as you're showing.
@AndreasSpiess 3 роки тому
I know and I thought I showed how it can be done.
@AmauryJacquot 3 роки тому
@@AndreasSpiess guess something got lost in translation, you sounded like "it's a shame, we lose something"
@AndreasSpiess 3 роки тому
We lose the standard pins which can be a problem if a library does not offer "pin shifting"
@ap8868 5 місяців тому
Nice video, as usual. I'm looking for a possibility to connect any ESP-processor with a dual ethernet shield (port mode) to have the possibility to be connected with two independend subnets. Furthermore I need a USB A socket to plug in an USB stick for csv-file export. If I understood your comments well, there are not enough pins, right? Cheers, Andreas (too)
@AndreasSpiess 4 місяці тому
I do not know if this is possible. AFAIK, the EXP32 only has 1 Ethernet port.
@ap8868 4 місяці тому
Thanks for your prompt answer. Meanwhile I have figured out that it should be possible to use 2x SPI and 2x ethernet module with W5500. And the ESP32-S3 Dev Kit comes with 2x USB (1x for power/programming, 1x SPI UART OTG). In total 3x SPI should be possible, right?@@AndreasSpiess
@AndreasSpiess 4 місяці тому
@@ap8868 I would check if the software supports 2 ethernet ports, too.
@ReneKnuvers74rk 3 роки тому
The danger sticker is about electro static dicharge or esd. Not about 48V which is generally counted as safe for skin contact. Note that this is certainly not always a safe voltage. Look into SELV and PELV topics and standard EN 50110 for a better understanding of safe low voltages. ESD is a different cookie.
@AndreasSpiess 3 роки тому
We both know it. It was more a joke. I never saw such a sticker on a Chinese board. And now I see one in an area which is probably better protected against ESD than every pin on an MCU.
@LiveSoftworks 3 роки тому
The way I always choose the T-568 standard is A for American and B for British, it does seem to follow based on countries I've seen that West of GMT uses A and East seems to use B
@AndreasSpiess 3 роки тому
Interesting observation...
@bubbaduck1109 2 роки тому
Will either board pass through power from PoE? Like, could you assign 12v or 16v or 48v to a GPIO?
@AndreasSpiess 2 роки тому
GPIOs usually only support 3.3 or 5volts. More kills the whole chip
@jumadhaheri 3 роки тому
Fantastic video
@AndreasSpiess 3 роки тому
Thank you!
@Valentino-ok2hss Місяць тому
Nice video, how to use the power adapter? How many volts?
@AndreasSpiess Місяць тому
That depends in the device.
@tof22 3 роки тому
7:30 "ESD" stands for "Electro-Static [breakable] device", meaning some components may be destriyed by a static electric (high voltage) discharge while touching it. It is recommanded to pull yourself dow to the ground (thru a 1Mohm resistor or a dedicated wristband) to protect such device while manipulating it. "ESD" sticker doesn't mean there is a risk of high voltage for yourself ;)
@AndreasSpiess 3 роки тому
I think we both know the sticker. My question: Why is this the first Chinese board with such a sticker and why at the point where the pins have to be protected against all kinds of external signals?
@jackhoffman6120 3 роки тому
Another alternative are Ethernet W5100 shields for Arduino AVR platforms. One Arduino Uno plus Ethernet shield (without PoE) is half the cost of the TTGO POE Board. . There are also Ethernet W5100 shields with PoE but then there is no price advantage.
@AndreasSpiess 3 роки тому
You are right. For me, POE makes the difference because of the cabeling advantage.
@RidingTheAlps15 3 роки тому
I'm using an Olimex ESP32-Poe-ISO in a room with a switch rack to get temperature and humidity. So I have power for the Board and the sensors. Additional I have a connection to a MQTT Broker via a separate VLAN. It's running for a bit longer than a year now. One advantage is, that, if I have to reboot the board I just deactivate the port and reactivate it, that wasn't necessary though.
@AndreasSpiess 3 роки тому
Thank you for sharing your experience!
@laialbert 2 роки тому
I’ve been playing with the ESP32-POE-ISO and a MAX31855 to measure thermocouple temperature, but couldn’t get GPIO Pins 1-5 to work with the MAX31855. Using pins on the other side of the board seemed to work. Have you encountered anything like that?
@RidingTheAlps15 2 роки тому
@@laialbert No I'm using I2C from the UEXT (GPIO13/16) Ports and GPIO35 for a PIR. Have you tried some other pins?
@laialbert 2 роки тому
@@RidingTheAlps15 Yes, I managed to get it working using GPIO pins 13, 14, and 15. Just strange that I couldn't get it to work with GPIO pins 1-5. I tried with 4 different boards, so I don't think it's an issue with bad boards.
@RidingTheAlps15 2 роки тому
@@laialbert Glad that you managed to get it running. I guess I won't touch the GPIO 1-5, when I will use another board.
@electronic7979 3 роки тому
Nice video. I liked it
@AndreasSpiess 3 роки тому
Thanks for the visit
@APW030587 3 роки тому
Is there a TTGO T-PCIE review about connectivity using nb-iot or lte-m network?
@AndreasSpiess 3 роки тому
I do not know. This technology seems to be quite new and still expensive...
@edgar9651 2 роки тому
Thanks! Is there any way to use this with only 4 wires and 100Mbps? Until a few years ago LAN cables had 8 wires but only 4 of them were used. That worked just fine. I guess 100Mbps is more than fast enough for almost anything. It would be great if there would be an option to use this "slower" speed and free up 4 GPIO pins. Is this possible? Thanks.
@AndreasSpiess 2 роки тому
Maybe it is complicated because the connectors have some internal components which might conflict with your goal. (ukposts.info/have/v-deo/rmh7o5qkm656rIk.html )
@feda9343 3 роки тому
Hello Andreas - I think you have missed to mention galvanic insulation. This is also important for IoT devices that are connected via a longer distance and can increase reliability.
@AndreasSpiess 3 роки тому
Ethernet cables are always galvanically separated (as Wi-Fi). So I do not see a big difference. Or do I miss something?
@feda9343 3 роки тому
@@AndreasSpiess I fear that POE mostly runs without galvanic insulation for an easier switching-power-design.
@AndreasSpiess 3 роки тому
It should not.
@TD-er 3 роки тому
@@AndreasSpiess It should not indeed, but there are lots of PoE dev boards out there that don't use the correct 10 pin RJ45 headers and/or the rather large PoE isolator transformer blob you see on your boards. Even some commercially available PoE powered devices don't use isolation for their PoE, which is fine if nothing is connected to the outside world from the board, but it is something to keep in mind when people start tinkering with it. For proper isolation of the PoE power supply you still need some rather bulky parts (almost the size of the ethernet header) or if you go smaller you end up using quite expensive parts or maybe only use those low power isolated DC/DC converter modules (often < 1 Watt)
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