Thanks Charles, On 20/08/18 13:55, Charles Lepple wrote: > On Aug 19, 2018, at 3:31 PM, Glenn Ramsey <[email protected]> wrote: >> >> Hi, >> >> I'm building a DIY UPS for a Raspberry Pi using a 12V SLA battery, charger, >> and an off the shelf 5V regulator. To monitor the battery level I'd like to >> use an Arduino or similar type device. Since the Arduino can have a serial >> over USB connection with the Pi I'd like to implement a protocol that can >> be used with NUT. >> >> Does anyone know if something like this has already been done? The only >> thing I could find was this [1], but it doesn't look like there is a NUT >> driver. Maybe I'm not searching with the right terms? > > I'm at a loss for the right search terms, and I know we had someone > considering building a USB/HID version of what you are talking about. If > there was indeed another discussion, it would probably be on the nut-upsdev > lists: > > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsdev
I found a post there from 2010: https://alioth-lists.debian.net/pipermail/nut-upsdev/2010-April/004740.html that describes what I want. > A related UPS project (but I think they ruled out Arduino-class processors > early): https://gitlab.com/esr/upside/wikis/external-interface > >> >> If I were implement a UPS protocol what would be the easiest one to >> implement that is already supported by NUT? > > The Megatec/Q* protocols are fairly ubiquitous, so that might be where I > would start. > > You mentioned serial-over-USB - does the Arduino show up as a /dev/ttyUSB* > node or similar on the Pi? The following assumes that it does. > > blazer_ser has some test strings: > > https://github.com/networkupstools/nut/blob/v2.7.4/drivers/blazer_ser.c#L73 > > but development has been moved to nutdrv_qx, which is the preferred driver to > test against (though it is a bit more comprehensive, and perhaps less clear > at first glance). > > Protocol documentation: https://networkupstools.org/protocols/megatec.html Thanks very much for that. That lead me to find this: https://github.com/xm381/Raspberry-Pi-UPS which appears to be exactly what I was looking for. Glenn _______________________________________________ Nut-upsuser mailing list [email protected] https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser
