Yes. UPS even die eventually. My little board tells the Pi to shut down when battery gets low. It's basically a smart mini ups.
Colin > On Dec 12, 2017, at 7:12 PM, joep <j...@naturalmethods.org> wrote: > > Hi Colin, > > I had those experiences as well (including permanently damaged SD Cards > and PC's damaged by lightning strikes) and now have all IT equipment on a > UPS. The 1-wire controller will be part of a home automation server and won't > be remotely installed - it will be in the study on a UPS. > > Regards > Joe P. > >> On 13/12/17 11:43, Colin Reese wrote: >> WRT power, USB power is still an issue, especially over long period with >> fluctuating power. I use a power-management board and battery backup for >> this reason. Non-graceful shutdowns not only corrupt the operating system, >> but also potentially the SDCards permanently. This is a bad situation, >> obviously, exacerbated for remote installations. >> >> C >> >>> On 12/12/2017 5:34 PM, joep wrote: >>> Thanks again Jan. >>> >>> >>> $ owserver --i2c=/dev/i2c-0:ALL >>> >>> That answers my most pressing question. >>> >>> >>>I'm talking about the Raspberry Zero W, which has a built-in SDIO WLAN >>> adapter and a built-in antenna. No fiddling with USB needed (though USB >>> power isn't much of an issue anymore since the Raspberry B+). >>> >>> I understood your initial suggestion re the Raspberry Zero W. My suspicion >>> is that WiFi is flaky irrespective of the host controller - I've had issues >>> with name brand WiFi units on name brand PC's. I suspect WiFi (and it's >>> drivers) is designed for shortish-term connections - not long ones lasting >>> months. Ethernet seems to fare much better. >>> >>> Regards >>> Joe P. >>> >>>> On 13/12/17 11:08, Jan Kandziora wrote: >>>>> Am 12.12.2017 um 22:38 schrieb joep: >>>>> Jan thanks for the reply. >>>>> >>>>> I currently have 2 Raspberry Pi's (of late 2012 vintage - forgot the >>>>> model ID's) and I've been running them since early 2013. I've run >>>>> one for 6 months non-stop (to manage the lighting and temperature in >>>>> a terrarium) and only stopped it to update the Raspbian firmware. I >>>>> use the "Blue DS9490R unit" (Dallas call it a DS9490R) to drive the >>>>> 1-wire network. On of the main issues I found with operating the Pi >>>>> with WiFi connectivity is the WiFi connectivity - seems to be a bit >>>>> flaky (maybe the drivers for the specific WiFi unit - the WiFi was >>>>> not powered directly from the Pi but from a USB hub) >>>>> >>>> USB power on the original Raspberries was a source of constant >>>> misfortune. And USB hubs often enough do, too. >>>> >>>> >>>>> So I don't >>>>> think I'll chose a Raspberry B Zero W for long term stability >>>>> reasons. >>>>> >>>> I'm talking about the Raspberry Zero W, which has a built-in SDIO WLAN >>>> adapter and a built-in antenna. No fiddling with USB needed (though USB >>>> power isn't much of an issue anymore since the Raspberry B+). >>>> >>>> >>>> >>>>> The system I'm thinking of building is for a home server and will use >>>>> a low-end laptop as I do not have to wire the basic infrastructure to >>>>> get a computing environment happening (power supply, screen, >>>>> keyboard, memory, case) - it's all setup already. All I'll need is a >>>>> USB-to-I2C-to-1_wire. >>>>> >>>>> If I'm to use a USB-to-I2C adaptor (say FT232H) to drive a I2C >>>>> 1-wire master (say a DS2482-800) how should I initialize OWFS? >>>>> >>>>> sudo owfs –d=/dev/i2c-0 /mnt/owfs ? or >>>>> >>>>> sudo owfs –u=/dev/i2c-0 /mnt/owfs (manual says this option is for a >>>>> "USB adapter (DS9490) as 1-wire bus master") ? >>>>> >>>> Please don't use the owfs binary. It has an unsolvable race condition. >>>> Use owserver and access it through the owwrite, owread, owdir, owget >>>> shell tools or through one of the language bindings. >>>> >>>> $ owserver --i2c=/dev/i2c-0:ALL >>>> >>>> Kind regards >>>> >>>> Jan >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> >>>> Check out the vibrant tech community on one of the world's most >>>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >>>> _______________________________________________ >>>> Owfs-developers mailing list >>>> Owfs-developers@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >>> >>> >>> ------------------------------------------------------------------------------ >>> >>> Check out the vibrant tech community on one of the world's most >>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >>> _______________________________________________ >>> Owfs-developers mailing list >>> Owfs-developers@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> ------------------------------------------------------------------------------ >> >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
