[clug] remote power cycling many machines

[Alastair D'Silva]

> -----Original Message-----
> From: linux <linux-bounces at lists.samba.org> On Behalf Of Chris Smart via
> linux
> Sent: Sunday, 5 April 2020 8:54 AM
> To: linux at lists.samba.org
> Subject: Re: [clug] remote power cycling many machines
> 
> On Sun, 5 Apr 2020, at 08:47, Chris Smart via linux wrote:
> > On Sun, 5 Apr 2020, at 08:42, Chris Smart via linux wrote:
> > > On Sun, 5 Apr 2020, at 08:14, Robert Edwards via linux wrote:
> > > > On 4/4/20 11:06 pm, Chris Smart via linux wrote:
> > > > > On Sat, 4 Apr 2020, at 20:11, Robert Edwards via linux wrote:
> > > > >> What have others tried/can recommend?
> > > > >>
> > > > >
> > >
> > > ESPHome also supports those ethernet shields I mentioned (LAN8720),
> > > if you do choose to go that way.
> > >
> > > Like this:
> > > https://www.sparkfun.com/products/765
> > >
> > > Which might come cheaper on Amazon:
> > > https://www.amazon.com.au/Mustwell-ENC28J60-Interface-Network-
> Ethern
> > >
> et/dp/B07G87619P/ref=sr_1_12?keywords=ENC28J60&qid=1586039079&sr=
> 8-1
> > > 2
> > >
> >
> > Sorry I was wrong. The ESP32 actually has a built in MAC so you could
> > build your own by adding a PHY (like the LAN8720 or TLK110), which is
> > what ESPHome supports. There might be a shield for that ready to go,
> > but it's not the ENC28J60 one I linked before.
> >
> 
> Like this, US$3, which is much cheaper than the ESP8266 Ethernet shields,
> thanks to the ESP32's built in MAC.
> https://www.electrodragon.com/product/lan8720-ethernet-breakout-
> board-phy/
> 
> -c
> 

If a hardwired solution is what you want, I have a 16 channel SSR controller
design, that speaks 1-Wire. Support is via OWFS.

https://github.com/InfernoEmbedded/onewire-softdevice

Hardware is minimal, and should cost <$10/unit in small quantities. It's
built around an STM32 micrcontroller, with a handful of supporting parts,
voltage regs, static suppression, RJ45 jacks and a handful of passives. I've
got blank PCBs & most parts for them already. You'll need to be able to deal
with SMD soldering to assemble them.

Output is 0-3.3V, which can drive solid state relays or low power mosfets.
For PCs, a mosfet pulling the reset or power switch lines to ground will
substitute for a button press.

-- 
Alastair D'Silva           mob: 0423 762 819
skype: alastair_dsilva     msn: alastair at d-silva.org
blog: http://alastair.d-silva.org    Twitter: @EvilDeece