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Wire over ethernet

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PlainName:

--- Quote from: ebastler ---You should probably state your data rate and timing requirements. I assume it's a steady stream of data which must be transmitted without interruption? Is the latency critical too or could generous buffering be used?
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Ah, perhaps I wasn't too clear. There is no data rate as such - imagine a button at one end and a button input at the other. Or an LED. Perhaps daylight sensor (analog). Stuff like that - if I need to do actual data comms then I would do that via a pukka IP connection.


--- Quote ---Also, presumably there is other traffic on the network -- do you need to share bandwidth?
--- End quote ---

Yes, normal LAN traffic. Currently is gigabit Ethernet and traffic is low: mobiles and satnavs periodically.


--- Quote ---what are the "ad-hoc digital signals"?
--- End quote ---

Dunno. That's why they are ad-hoc :)


--- Quote ---You can't really ask whether a suitable product is available without specifying that, right?
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I believe that's what I did at the start, yes! However, whatever solution presents would, of course, define what I could connect up, so think of it more as trying not to narrow the possibilities to some specific thing (like  how it's concentrated on serial data already!). I'm sure that if I succinctly describe a specific usage there will be a big discussion on how to perfectly sort that and nothing else will work with it.


--- Quote from: pqass ---Well they do make serial to Ethernet converters.
--- End quote ---

Yes, but that's NOT what I want to do (already have those if I needed them). I used that simply for illustration to show the idea of having none-IP stuff traverse a network, but I am quickly thinking that might've been too helpful :(


--- Quote from: tom66 ---Does the network interface have to play nicely with existing Ethernet infrastructure
--- End quote ---

Yes.


--- Quote ---or are you just looking to utilise the cables for sending signals
--- End quote ---

No, that's what it used to be. About twenty years ago I buried two runs of cat5, using one for network and t'other for alarm. Then because there was little use for the network (just a milling machine, and I preferred to keep that off the net for security) I used that cable for security cameras (four in the end, using baluns at each end). But now the alarm had an alternative route and we needed decent WiFi there so it made sense to convert the alarm cable over to Ethernet. But... I kind of got used to being able to use the unused pairs in the alarm cable for simple connections, so that's what I'm trying to replicate.

PlainName:

--- Quote from: thm_w on March 26, 2024, 08:42:37 pm ---Also OP is asking about analog signals.
You can get those too: https://www.aliexpress.us/item/3256805676123978.html Has up to 6 analog inputs and outputs for $30.

But I don't know how hard it is to set up two to just pass data through, or what sort of bandwidth they have.

--- End quote ---

Wow! That looks interesting enough to have a play with even if, ultimately, it doesn't turn out. Thanks  :-+

Edit: maybe... It wants a PC or terminal at the other end, which isn't in the plan. It could be done easily enough by having some intelligence reading from one and writing to the other (and vice versa), a kind of MITM controller. Is that simple and easier than just rolling my own network dongles which would talk direct to each other? Difficult one... But any excuse to try new toys :)

thm_w:
Yes looking at the manual it needs a PC so can't be device to device. For that level off the shelf I'm guessing you'd need a full on PLC or similar.

Another few: https://www.aliexpress.us/item/3256804650601020.html https://www.aliexpress.us/item/4001078446561.html
ESP32 breakout for WIFI stuff (coding required): https://www.aliexpress.us/item/3256806016605486.html

PlainName:
The ESP32 ones look right, and close to what I had in mind to DIY.

themadhippy:
If its a 4 pair cable roll back to a 100meg  connection and free up 2 pairs

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