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- Опубліковано 12 гру 2020
- How 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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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.
Thank you for sharing your experience!
Great video as always 👍😊
Thanks for sharing your experience with all of us 😊
Thanks for watching!
At 280k wide, its a considerable front row. Glad I caught center seat!
:-))
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 ;-)
So you have to switch to IP6 ;-) I still have some time for that step.
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!
Happy Holidays to you and your family, too!
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.
You are right, there are many ways of adding pins if you need.
Great! Left the ESP32 aside for the lackof wired ethernet!
As always great video! Thank you. 😃
You're welcome!
6:52 min "Power over Internet" would be a great Idea! :)
back to the 80s when our telephones were powered from the network 🤣
He should patent that! Even Swiss banks will not be big enough for all the money that he will get then.
:-)) Actually, POE is similar to the 1980s telephones with only one wire...
With a google account you probably get the first 15 GWh for free :-)
@@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.
Very well explained, as always! Thanks for sharing
Glad you liked it!
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).
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.
@@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.
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.
4:01 I have never heard a better explanation of the wiring standard differences.
Thank you!
Muchas gracias Profesor Andreas. Bendiciones, maravillosa explicación.
You are welcome!
It would be great to switch home automation on PoE for multiple reasons. Also, it will reduce the Wifi traffic a lot.
Thanks
Cheers ✨✌
Yes, you are right
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)
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
I do not like these ESP cams. Not enough quality...
As always; Not disappointed with the content of your videos!!
I do think I'll stick to wireless for now.
No problem. Me too for many projects. Knowing alternatives is always good for me.
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 !
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.
@@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.
as always excellent information!!!!
Glad you think so!
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
Always the last about 10 videos doe not carry numbers.
This is a good addition for the ESP32, having PoE on the board will make this very useful for stationary installations.
Yes, definitely
Nice summarize, thx.
Glad it was helpful!
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!
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.
I have been crossing the PITA wires in my cables for ever. And now I learn it isn’t necessary. Thank you!
At least as far as I know.
@@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.
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.
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.
Quite similar here...
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..
Good choice for Ethernet. I liked the POE capability of this board because it makes cabling very simple.
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.
I do not understand what you want. There are basic videos no how to start with the ESP32. Just google
This is awesome. Good shielded cable and my ham shack has one less possible source of rf interference.
True. Still a lot remaining ;-)
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 ;)
Fingers crossed!
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?
PoE has nothing to do with how sensors are attached to the boards.
Very nice video! One question. I have a microtik switch that gives passive poe not the standard 48V. Will the ttgo board will work?
It should if the voltage is around 30 volts. But I do not remember where I read it.
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
I lived in Kousseri because of the war in N'Djamena
Thank you!
You're welcome!
The small hand again 😍
It lives somewhere here and appears from time-to-time ;-)
@@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.
@@AndreasSpiess love that little hand!
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?
I never tried two boards together. But this topic is not for a video. Too special.
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
So far I do not use SSL on my home network, especially not on the wired one.
Thanks for a great video :)
Do you know if OTA will work together with this ?
It seems they have a Tasmota version for it. So I assume it also will do "OTA".
6:52 Power over Internet .... nice :-)
I already made the same mistake in the POE video :-(
Can I download a stronger power supply for the RTX 3080 I'm never going to get?
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!
You are right for IOT only. For me, Ethernet is an neutral infrastructure which has to be independent and long-term.
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.
Thank you for supporting me ;-) We probably have the same experience.
Nice video. I liked it
Thanks for the visit
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
Yes. The Pi connects automatically to the Ethernet network if a "valid" cable is plugged in.
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.
You have to check. I did not try it.
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.
Many technical standards are not used after a few years. this is why I like Ethernet...
Fantastic video
Thank you!
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.
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...
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
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.
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
POE makes the difference for me...
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.
I agree with your comment about locks etc. POE routers are of course more expensive. But very handy...
Was that Node Red you were using in the video? Thank you for sharing on your very informative channel :)
Yes, node-red. There are other videos where I use it.
@@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
love them already !
:-)
@@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
Wunderbar. Merci !
Gern geschehen!
Thank you! Is it possible to connect OLED screen or e-paper to it?
Maybe, if they do not need too many pins.
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.
A Wi-Fi door lock is probably not a goood idea, I agree...
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
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.
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.
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
Ja, das ist ein bekanntes Problem. Insbesondere wenn die Distanzen zur Antenne klein sind.
Very good. Could you build a home alarm with this?
I think so.
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!
You can chose nearly any pin for a UART. I recently made a video about the ESP32 pins.
@@AndreasSpiess thanks! I'll take a look when the board arrive. Really appreciate your helpful videos :)
I’ve been using olimex poe boards but have found the boards do get quite warm while powered by poe.
Good to know!
Danke. Dein Video hat mich wieder bestärkt ein kabelgebundenes Smartphone zu bauen. Aber ich würde auf POE in einem smarten Schalter verzichten und dafür einen Switch Chip integrieren, damit man das Ethernet zum nächsten Anschluss/Endgerät durchschleifen könnte.
Viel Vergnügen bei deinem spannenden Projekt! Du hast dir das mobilste Gerät ausgesucht...
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?
Thank you for sharing your experience with non copper cables.
@@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...
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 :)
Thank you for sharing your experience!
Is there a TTGO T-PCIE review about connectivity using nb-iot or lte-m network?
I do not know. This technology seems to be quite new and still expensive...
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.
I thought you can program this board using the USB connector (as most other ESP32 boards).
We have been using the w5500 spi Ethernet shield using the esp on a wired connection that uses only 1 Pin besides spi :))
:-)
I have been told, that RJ-45 and cat cable are originating from AT&T Bell laboratories within the phrase "Premises distribution system". AT&T manufactured those components and cables with the name Systimax. The PDS contains also passive adapters for RS-232 and Token ring and coax video etc. PDS RJ-45 connector 2 center pins are because of RJ-11 phone connection.
Good to know the history of the RJ45 connectors. The first Ethernet cables I know were coax with BNC connectors, if I remember right. In a daisy-chain configuration, not a star.
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!
I think this is a different story and so far I never heard of such projects.
@@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!
Nice video, how to use the power adapter? How many volts?
That depends in the device.
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!
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.
Would be really cool if the BLE worked to read out the BLE sensors I have. I really hope someone gets BLE working combined with the ethernet.
Maybe you try. I did not bother too long...
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.
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.
Hello Andreas, while tinkering with the olimex poe using the adc, i noticed there is alot of noise on the voltage lines(200KHz) preventing the reading of a stable signal, do you know how to eliminate this noise?
No, I never looked at this aspect. I would ask Olimex if they know the issue.
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
You are right.
hey what is that simulation program for your demonstration ?
I use Powerpoint for my videos
What 4x4 is that in the Cameroon picture? Looks like a Lada
It was a Lada Niva, you are right.
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 :-)
I did not speak of "modbus" as a protocol here. I talked about the cabling, I think.
@@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 :-)
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?
I do not think this will be legal
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
My first VAXstation also used coax cables in Daisy chain configuration...
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.
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.
@@AndreasSpiess sounds good, thank you. Really have to think about this PoE stuff, again.
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!)
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.
Ethernet is already built-in into the ESP32 chip :-)
Will either board pass through power from PoE? Like, could you assign 12v or 16v or 48v to a GPIO?
GPIOs usually only support 3.3 or 5volts. More kills the whole chip
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.
It is not easy to measure this current and I do not care too much :-(
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
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.
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
It looks it uses the IDF and not Arduino :-(
My cheap ethernet tester had me cutting off the ends of my homemade cable and I tried putting on a new one over and over - until I figured out there was bad solder joint on one of the LED pins in the tester !
Bad luck! I assume now it works and you can trust your cables are the root cause...
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?
Maybe an interesting project... It should be possible, but probably not on this channel.
@@AndreasSpiess why not? Do you atleast know what I should search for to come closer to the solution of this project?
I would cut it into parts and search solutions for each part.
@@AndreasSpiess you mean search for a wireless project and than search for a way to make if wired?
When flashing this the power is given by the CH340C or the main board requires power as well?
I do not understand your question
@@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.
Most boards are powered with the USB programming cable.
i liked this video for the small hand.
:-)
1:20 Whoa, that was cool!
Actually it was quite hot there. The war and the weather ;-)
@@AndreasSpiess Hahaha, I bet ^^"
Look like you had some experience with the Niva. :-)
Yes. Good ones!
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.
Maybe it is complicated because the connectors have some internal components which might conflict with your goal. (ua-cam.com/video/v8JodmdxIKU/v-deo.html )
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.
You are right. I recently bought a pack of such connectors...
@@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?
I only use Google for my research. Often I find links to other sites in some comments in forums or so.
Very Good.
Thanks!
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
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.
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?
Cat7 also isn't recognized as an official standard by the TIA/EIA.
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 !
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:
ua-cam.com/video/f2bILsfu8NM/v-deo.html
ua-cam.com/video/aVtOmrULE2w/v-deo.html
about using same wifi functions in code - i didn't quite get it: is it possible to connect such boards to ethernet (using poe) and at the same time disable wifi/bt completely? because having wifi/bt enabled and just not connected/registered with ap - is not quite private in my understanding
It does not connect to your AP if you use this code.
@@AndreasSpiess But is RF-part of esp32-module enabled?
You decide with your code.
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
Interesting observation...
Hello good morning, what is the latency pinging to the esp32?
I do not know, I never cared about it.
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.
I know and I thought I showed how it can be done.
@@AndreasSpiess guess something got lost in translation, you sounded like "it's a shame, we lose something"
We lose the standard pins which can be a problem if a library does not offer "pin shifting"
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.
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...
@@AndreasSpiess :-)
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.
Maybe somebody will create such a board if the future when Ethernet becomes more popular...
@@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!
Cani use this with ESP32 as Poe and “any” cat 6 or cat 7 shielded wire?
The cable should not matter. But the switch has to provide PoE.
Speaking of the Token Ring: In Germany (and probably other german-speaking countries) it's also refered to as "toter Ring" (dead ring) because it pretty much died out after Ethernet became a thing.
I never heard this name :-))
Been using 485 and 422 for years. Very hardy. Top out around 10Mbs but for most things, it's perfectly fine.
It is a good standard and widely used. For the future I find Ethernet more flexible.