From: Chris McGee <newton688@gmail.com>
To: 9fans <9fans@9fans.net>
Subject: Re: [9fans] PoE Support for Plan9 on RPI 4B/3B+?
Date: Tue, 24 Mar 2020 08:16:03 -0400 [thread overview]
Message-ID: <CAOk9ws1FONsH-cGqz_DhQN8spEzrqWiS+WbPJivD6RSQfQwPRw@mail.gmail.com> (raw)
In-Reply-To: <CAJSxfm+Xu9gg4Z86HXoq7XNtLMm0rsYtxVd46ZaqFbAhMPm3=Q@mail.gmail.com>
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I can vouch for the fact that the Pi 1,2 and 3 work fine with a simple 12W
10/100 PoE network/power splitter. They work fine with 9front as it is
mostly transparent to the OS as far as I can tell.
Chris
On Mon, Mar 23, 2020 at 5:23 PM Skip Tavakkolian <skip.tavakkolian@gmail.com>
wrote:
> The PoE hat shouldn't need any software support. I don't have one, but
> it's basically a DC-DC converter. The Pi PoE hat has an Attiny processor
> for temperature sensing/fan operation.
>
> You can also use a PoE splitter (48V->5V/2.4A micro USB) which would work
> for all Pi's.
>
> -Skip
>
>
> On Mon, Mar 23, 2020 at 12:16 PM <barrywasdell@gmail.com> wrote:
>
>> I have four Raspberry Pi model 4B boards and a Raspberry Pi model 3B+
>> board and would like to know whether or not Power over Ethernet (PoE) is
>> supported by the Pi9 port.
>>
>> Has anyone attempted to power a Plan9 cluster/grid over PoE? What PoE
>> network switches would you recommend? Were there any issues? Richard
>> Miller?
>>
>> To be clear, a PoE network enables boards to be powered over an Ethernet
>> network if a side-board (HAT) is connected. [1] A PoE network switch
>> conforming to IEEE 802.3af delivers power through the each Pi's RJ45
>> network connector over Cat 5 cabling. [2]
>>
>> To my knowledge, neither the 9front kernel sources nor the documented
>> list of supported hardware, specifically mentions PoE. [3] It seems the
>> network switch and HAT negotiate power delivery independently of the
>> kernel so I cannot think of a reason why Plan9 would not support
>> powering this way.
>>
>> References
>> [1]:
>> https://www.raspberrypi.org/blog/introducing-power-over-ethernet-poe-hat/
>> [2]: https://ieeexplore.ieee.org/document/1213877
>> [3]: https://9p.io/wiki/plan9/Supported_PC_hardware/index.html
>>
>> --
>> Barry Wasdell (bwasd)
>>
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prev parent reply other threads:[~2020-03-24 12:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 19:15 barrywasdell
2020-03-23 21:22 ` [9fans] " Skip Tavakkolian
2020-03-24 12:16 ` Chris McGee [this message]
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