[Nut-upsdev] Questions on the state of the UPS market

[Arnaud Quette]

2009/1/16 Eric S. Raymond <esr at thyrsus.com>

> Arjen de Korte <nut+devel at de-korte.org <nut%2Bdevel at de-korte.org>>:
> > Also note that the requirement for an IP stack makes this far more
> > complex than what you need for a USB interface. So while the hardware
> > for the interface may be cheap, it places much higher demands on the
> > microcontroller (and firmware) to actually use it.
>
> Indeed.  I concluded during my last serious look at this market in 2005
> that Ethernet is way overkill for this class of device, RS232C should
> be shot through the head because it can't autoconfigure, and USB is an
> almost perfect functional match for what UPSes need to do.
>

the holy grail for UPS manufacturer is PLC (
http://en.wikipedia.org/wiki/Power_line_communication)
but to be useful and perfect in this area, that would requires each system's
power supply to embed PLC!

Arnaud
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