First of all you need to ensure that the TP-Link router is properly installed. The ethernet cable from the CS3 needs to not go into the yellow socket but one of the black ones. The house router needs to be completely out of the picture. Your TP-Link is acting will act as a wireliess link to the house router if your ethernet cable from the CS3 is connected to the yellow socket. If you finally manage to get the TP-Link as a wifi broadcaster its address should show up in the list of available wifi connections on your pc. You need to select it. Then you need to enter the ip address of the CS3 into the browser of your pc. You can find the ip address in the systems tab of your CS3. It should be something like 192.168.X.Y where X and Y are something like 1 & 3.
TP-Link has a web site where you can configure it.
Unfortunately the answer is not as simple as 4. You need to read manuals and understand the terms such as ip address. It is like many years ago trying to tune up a car and not knowing what a gap was. Or a carburetor. Having someone show you worked then but how to do that through a chat room?
I just looked at my TP-Link and the female sockets to use it as a wifi broadcaster are orange and there are four of them. The socket to use it to connect to the internet is dark blue. I happen to have a hard wire to my house router which I would plug into the ehternet socket on my CS3 when there was an update available and for some now unknown reason I plugged it into the dark blue socket so now I no longer have to change the plug when there is an update. But I don't know why it works.

It depends on what he means by "web server". If he wants to control his layout and trains with a pc like we can do with a smart phone or pad then he needs to follow my instructions. So he needs to explain what exactly he is trying to achieve.

Hi

Have you put your TP-Link nano router into client mode ? (and your cs3 needs to be powered on after the nano router has made a connection to your main router.)
And then your PC and cs3 must be on the same router.

An alternative to a wifi link, is a pure power line adapter. eg: https://www.tp-link.com/en/home-networking/powerline/tl-pa8010p-kit/ (that what I use for my CS3)

(This is primarly network issue, and getting a basic understanding of how a home network works is highly recommended)

TP-link is properly installed. Took me two days to make the pesky thing to work. It was put in client mode. And it did work with CS3 on the PC screen and everything – 2 weeks ago. Now nothings works. The TP-Link is a TP-WR802N Nano Router. To my knowledge it works on numerous other computers here in Denmark.

The IP address in the CS3 is 192.168.0.131.
The IP address in the PC’s network is 192.168.0.120.

With the TP-link mounted in the CS3, with net cable and power supply, light in the TP-link, I enter 192.168.0.131 in the PC’s browser. I get the following error:

“Cannot connect to this website
192.168.0.131 took too long to respond.”
(directly translated from Danish)

I have then tried to connect the net cable between the CS3 and the PC (i.e. going from wireless to wired), and enter the ip address – same result…

I have also tried with my cell phone to can the QR code on the CS3 – get the error that the page can’t be reached.

I am on the brink on concluding that the settings and hardware are as they should be, but it simply doesn’t work in my case.

I have now reset and reinstalled the TP-Link some +10 times. The CS3 screen can't be shown on the PC, as the PC can't "find" the TP-link. Tried with a cable between CS3 and the network router. Works fine on the PC - but train layout and network router are 50 feet apart - I don't want to pull a long power wire fron the CS3 to the rails!

Conclusion: The TP-Link is a piece of sh*t, and it will be discarded - as far as I can throw it.

Well, it doesn't. It is just a small box with a green light - no other function....

So... does anyone know how I connect the PC and the CS3 with an ethernet cable? Apparently I need to set up some IP-addresses, subnet, Router and DNS in the CS3. What to do?

To do that you should be able to set the PC up as a router, and if you set the cs3 up in DHCP mode the PC should supply all the relevant information when the cs3 logs in.

I've never tried doing this with a PC, so you may need to resort to one of the AI minions to guide you through the process.

Did you checked after PC computer stand in DHCP?
I use cable network and my router are not wireless.
If you buy a new router by use power connect and cable network you have more safety internet connection.
Also always have firewalls in the router too.

So, I have now learned that the TP-Link TL-W802N didn't work. I have ordered another, and will give it a last shot.

I have also learned, that it is not possible to "just" connect the PC and CS3 with an ethernet cable (or any other cable); instead the CS3 has to be wired to the router. But the router and the model layout are situated in each end of the house. Placing the CS3 with the router will require a 50 feet power cable to the tracks - or the CS3 needs a 50 feet ethernet cable through the house to reach the router. Kinda goes against the "wireless" idea...

I know dozens who have made the setup with the TP-Link and made it work in less than 15 minutes. But in my case, it just won't work...

I admit that I am not an internet/tech guy, who understands all the technical terms, but I can follow a well written instruction meticulously. When it still doesn't work, well, what to do then... I am not able to troubleshoot in a field that I am not used to operate in

When I use CS3 this is how I connect up:

Router...Imac
Router...CS3
Both Imac and CS3 does have network cables connect.
When I turn power on the CS3 the communication starts between router and CS3.

Amazing. I have a TP-Link model Archer C54 AC1200 dual band Wi-Fi router - $29.00 at Walmart. I had trouble setting it up but used their web site to figure it out. I have used it to access my CS3 via web browsing and twice with a pc to mirror the CS3. Our club for some unknown reason buried in its past always connected a router to our CS3 even though no one currently seemed to know why or how to access it. So I brought an iPad to one show, connected to the router and would use it to operate whistles, bells and horns on the locomotives that had them functioning when near visitors. I had a ball. I also helped other club members connect their smart phones to the club CS3. It is not complicated. But you need to go through the learning process at each stage. For example there were a number of times when I could not connect but learned that plugging the ethernet cable into the wrong plug on the router would prevent a connection as would turning on the router after the CS3. I also learned that mirroring the CS3 on a pc was possible but required going through a very specific set of steps. My house router is on a different floor from the CS3 though directly below it. I was able to connect my CS3 to it via a long ethernet cable because there was already a tv cable between the two but I only use it for CS3 updates. The web browser and pc mirror were both via wifi. I did not care for the RealVNC mirror as I primarily just experiment with evens and feedback mechanisms and my pc screens are not much larger than my CS3 screen. And I prefer having the additional controls provided by a web browser.