On Jan 21, 2015, at 8:57 AM, Maurizio Iacaruso <[email protected]> wrote:
> I see the raspberry documentation in order to understand if it’s possible > “replicate” an USB signal to GPIO. > So, with a TTL-USB cable I send the signal to the NVR. > > I hope this is possible! Possible, but not recommended. (You would probably need to add a USB host chip - USB is a synchronous protocol, so the GPIO timing would need to be very precise.) Is there any way you can send a HTTP request to the NVR to tell it to shut down? With the UPS monitored by NUT, you could launch that via an upsmon NOTIFYCMD. http://www.networkupstools.org/docs/man/upsmon.conf.html -- - Charles Lepple http://ghz.cc/charles/
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