I agree with earlier posters, such documentation can help future tinkerers. There is probably more than just one to hold the hand and walk through the ordeals :)
Perhaps a new page at https://github.com/networkupstools/nut/wiki can be a good location... Jim On Thu, May 16, 2024 at 1:29 PM Bill Gee <b...@campercaver.net> wrote: > Hi Kelly - > > As an Arduino nerd, I am interested in this! I am sure others on the > list would be interested. If nothing else, it would be nice to have > some documentation in the archives. > > I assume you set it up as an online system rather than a standby system. > Right? If true, then the choice of inverter is fairly critical. It > has to be bomb-proof reliable. > > What did you choose for battery voltage? What is the power capacity of > the inverter? > > Which Arduino did you use? All of my Arduino projects use the Pro Mini, > though it would be quite easy to get some other model for this. > > Thanks - > =============== > Bill Gee > > On 5/15/24 20:11, Kelly Byrd wrote: > > I put together my own DIY UPS, it's a RV charger/converter, an > > inverter, and some batteries. I use an Arduino and the HIDPowerDevice > > library (https://github.com/abratchik/HIDPowerDevice > > <https://github.com/abratchik/HIDPowerDevice>) to get it to talk to > NUT. > > Been working great for months! > > > > The Arduino is connected to two modules: > > * AC detection circuit to measure mains power on/off > > * Voltage divider and an external ADC to get a reasonably good DC > > voltage level for the battery which I turn into the a charge percentage. > > > > This uses the USBHID driver in NUT and "just works" as long as you're > > using NUT 2.8.2 or later. I used the example code in the HIDPowerDevice > > library as a starting point for running on my Arduino. > > > > I can share more specifics about the Arduino side of things off list if > > you want, the NUT side of things is pretty boring and normal. > > > > On Wed, May 15, 2024 at 3:27 PM Kiril Zyapkov via Nut-upsuser > > <nut-upsuser@alioth-lists.debian.net > > <mailto:nut-upsuser@alioth-lists.debian.net>> wrote: > > > > Hello, > > > > I found out about NUT just days ago while searching for a solution > > for my home setup. After some digging through the interwebs, I come > > to you with questions. > > > > I'm putting together a DIY 12V UPS, very similar to what this guy > did: > > > > [1] > > > https://baldpenguin.blogspot.com/2015/10/diy-12v-ups-for-home-network-equipment.html > < > https://baldpenguin.blogspot.com/2015/10/diy-12v-ups-for-home-network-equipment.html > > > > > > The objective is to keep a bunch of mini PCs and network gear online > > for as long as the battery lasts and then provide a mechanism for a > > graceful shutdown of my NAS and other appliances for which cutting > > power would not be healthy. The project above is missing the > > "connected" part. I want to get mine to play with NUT nicely. Other > > prior art is this project: > > > > [2] https://github.com/xm381/Raspberry-Pi-UPS > > <https://github.com/xm381/Raspberry-Pi-UPS> > > > > Mentioned in a previous thread here: > > > > [3] > > > https://alioth-lists.debian.net/pipermail/nut-upsuser/2018-August/011198.html > < > https://alioth-lists.debian.net/pipermail/nut-upsuser/2018-August/011198.html > > > > > > A valid approach -- emulates an existing protocol on an arduino. > > > > Are there other similar projects that you know of? I found plenty of > > "DIY UPS" projects, but none were "smart". > > > > I am able to put together firmware for some micro which will take > > care of measuring voltages, currents, possibly also turn on/off > > loads, serial or USB or IP are options. Not sure yet what hardware > > features I'll put together, but this depends somewhat on the > > approach for getting this thing integrated with NUT. PSUs and > > batteries are already on the way, and my junk drawers have most > > other parts I may need. > > > > So, options found so far: > > > > * Use genericups. Least favorite option, very limited features > > > > * Use the same approach as [2]. If I were to go that route -- which > > is the best protocol to pick for emulation? I'm looking for > > something simple, extensible/flexible and well-documented. > > > > But what I really wish was possible was the ability to describe my > > device in some format, feed it to a generic driver in NUT and > > profit. I see some efforts have been made in this direction, most > > notably: > > > > [4] > > https://github.com/networkupstools/nut/wiki/Data-Mapping-File-(DMF) > > <https://github.com/networkupstools/nut/wiki/Data-Mapping-File-(DMF) > > > > > > What is the state there? Is it usable for USB HID? Or, how hard > > would it be to make it usable? Even a modbus description will do -- > > implementing the modbus server (yes, server, I'm being > > politically-correct) over serial or even TCP is easy, if only there > > was a way to dump a CSV with register descriptions in some magical > > driver... > > > > And yet another approach which comes to mind is to implement my > > driver as an external executable. This may be completely unfeasible > > and stupid, and please let me know if it is. But, from what I > > gather, drivers run in their own process and talk to the daemon via > > a UNIX socket. Why not make it possible for the driver to be just > > any executable, built/deployed outside of the NUT codebase? The > > socket protocol seems simple enough, and this will allow for ... > > creativity. It could be implemented in any language (including > > scripting languages) and need not depend on anything NUT-specific, > > other than maybe some common CLI interface and/or configuration. > > > > I'm hoping the NUT masters will have some insight. Thanks for > > working on this! > > > > Cheers, > > Kiril > > _______________________________________________ > > Nut-upsuser mailing list > > Nut-upsuser@alioth-lists.debian.net > > <mailto:Nut-upsuser@alioth-lists.debian.net> > > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser > > < > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser> > > > > > > _______________________________________________ > > Nut-upsuser mailing list > > Nut-upsuser@alioth-lists.debian.net > > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser > > _______________________________________________ > Nut-upsuser mailing list > Nut-upsuser@alioth-lists.debian.net > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser >
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