openwrt ONE: PoE power supersedes USB

[Michael Richardson]

Back in March I reported a problem with PoE power being used on the OpenWrt
One even when the USB power was plugged in.

The thread was here:
https://lists.openwrt.org/pipermail/openwrt-devel/2025-March/043842.html

As David Lang summarized:
> I would expect that if it's plugged in to USB, PoE appearing or
> disappearing would not matter
> but ideally, as long as either has power would be the best (just combining
> the two power sources together via diodes or something like that)
> David Lang

and I wondered:
a) did this learning get into the OpenWRT Two?
b) I assume later production runs of the OpenWRT One still have this problem.
c) is disabling the PoE still hard to do... maybe there any easy to cut trace?

I only ran into this at IETF Hackathon, and now that I know, I know to
insert an unmanaged switch inline.  I wasn't trying to use PoE at the time,
it just happened.

---

{On a mostly unrelated note, anyone seen a PoE powered switch or router, which can
*also* supply PoE power "downstream" to another device?  Yes, it obviously
has to negotiate enough power...  This is for adding a PoE powered camera in
a place that currently has only a PoE powered phone}

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        |    IoT architect   [
]     mcr at sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

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