for what it is worth I do not use a UPS - and we get frequent power outages here. I do use a usb hard drive though instead of the SD card on my rpi. Weewx has always recovered the data from my current davis and my earlier fineoffset without any issues, so i see no need for a ups. Anyways sometimes our outages are for 3,4,5 hours so it is doubtful the ups would keep things running anyway even if I had one. I do have an RTC installed to make sure there are no hiccups in recovering the data from the station logger though!!
On Tuesday, 19 November 2019 20:18:46 UTC+2, David VE3STI wrote: > > Susan: Do you have a Davis system? The reason I ask is that, from my > reading of the comments over the last few years, this 'argument' between > the RPi starting up and the weather station hardware may be limited to the > Davis systems with their logging interface. Would you be willing to share > your coding/scripts/etc with the rest of us? Although I have added an RTC > and a UPS, I wish that my system was robust enough to reliably deal with > power interruptions without these additions. (The RTC and UPS cost more > than the RPi!) > > David > > On Mon, 18 Nov 2019 at 21:32, Susan Mackay <[email protected] <javascript:>> > wrote: > >> I use an RPi Zero W for Weewx and Nginx as well. >> I use systemd to manage it and have pre-requisites that the 'ntp.service' >> and 'time-sync.service' have completed before it will start. >> Susan >> >> On Monday, November 18, 2019 at 11:52:38 PM UTC+11, David VE3STI wrote: >>> >>> The problems occur during the startup, before the RPi sets its clock >>> from the Internet, and appear to be issues with the RPi and the Davis >>> equipment disagreeing on the time and getting muddled. It has been the >>> topic of much discussion and you can read the gory details in the wiki. I >>> won't go into the details here. If you have a UPS and rarely reboot, it >>> becomes almost a non-issue. >>> >>> David >>> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "weewx-user" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/weewx-user/I5C5Wqvtw7c/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-user/c6136128-8d33-450f-84b0-e70e75c49330%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/c6136128-8d33-450f-84b0-e70e75c49330%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/44bc2cd3-0c5d-45d1-8f6d-1913424916d0%40googlegroups.com.
