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Comment by elcritch | Hacker News Reader

Nah, ESP32's have had ethernet capability for a while and ESP-IDF supports it well. I've been using one I built for 5+ years now. Unfortunately RMII (ethernet phy) interface takes up a lot of the GPIO pins. This part looks like it'll remedy that issue.

There's two ESP32 boards that have been around for a while with PoE:

- https://www.tme.com/us/en-us/details/esp32-poe/development-k... - https://wesp32.com/

I'm more hopeful for single-pair ethernet to gain momentum though! Deterministic, faster than CANBUS, single pair, with power delivery:

https://www.hackster.io/rahulkhanna/sustainable-real-time-la...

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Waiting for my ManT1S:

https://www.crowdsupply.com/silicognition/mant1s

I really wish there was a camera option. You’d have made wired doorbell cameras possible without a retrofit.

I’d buy in a heartbeat

> I'm more hopeful for single-pair ethernet to gain momentum though!

I keep looking for a reasonably priced 10baseT to 10Base-T1L bridge... everything commercial seems too expensive (for me) and the two hobby designs [1] [2] I've seen are not orderable :(

But I'm seeing more commercial options lately, so that's hopeful.

[1] http://robruark.com/projects/10BASE-T1L/10BASE-T1L.html

[2] https://matthewtran.dev/2024/08/10base-t1l-converter/

The ManT1S linked by a sibling has a bridge. Still not cheap, but probably better than most commercial ones.

any reason you won't send #2 to a pcbfab? include assembly if that's an issue.

SPE with multidrop and PoDL would be awesome ! They are working on that and it will be everywhere.

Multidrop SPE isn't going to outperform newer CAN versions though. Somewhere in the sub-100Mb/s (e.g. 10-20Mb/s range) is the practical maximum speed of a multidrop bus at useful lengths, and that essentially applies equally to CAN or SPE. The only way to really get faster in a "multidrop-like" sense is with logically loop-like systems like ethercat and Fibre Channel where each network segment is point-to-point and the nodes are responsible for the routing.

Are the newer CAN versions single pair with power delivery? Those are the real sweet spots of SPE.

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