Ok - many thanks for you advice. Looking on amazon.co.uk could you recommend one of the RTCs listed there. It needs to work with a Raspberry Pi 3
Again many thanks John On Wednesday, May 23, 2018 at 2:56:23 PM UTC+1, Andrew Milner wrote: > > Nearly all the software 'solutions' have a downside of one sort or > another. Since you have an expensive weather station I truly do not see > the problem in spending another £8 on a clock for your computer. I even > fit clocks to my pi-zeros because without a reliable clock the Pi is pretty > naff. > > You could always try and fiddle even more with the start up script - but > believe me th\t many many have been there before you. The current weewx > solution will wait for a time to be within the past year I believe to get > around the totally stupid epoch zero times - but this does not work well > when the fake hardware clock on the pi is involved as the time could be > just an hour or so adrift. If you disable hardware clock completely weewx > will wait for a time before starting - but other parts of your rpi system > will then be running with the epoch zero date/time. People have tried > waiting for NTP to be available - but that also has not been 100% reliable > - hence the current evolution in weewx. Truly, the best and most foolproof > way is to fit a b....y clock and be done with it. Unless you are a > masochist and want to spend the resy of your life chasing oddball issues ……. > > > > > > On Wednesday, 23 May 2018 16:48:35 UTC+3, iss....@gmail.com wrote: >> >> I was hoping for a simple software solution like inserting a delay into >> the WeeWX startup routine to give the Pi time to Gert the correct time >> >> >> John >> >> On Wednesday, May 23, 2018 at 2:25:45 PM UTC+1, Andrew Milner wrote: >>> >>> The simplest, easiest and best way is to get a RTC module for the RPi. >>> Cost is under £10. Removes all the hassel of the RPi not having the >>> correct time. weewx tries to wait for time to have been set as best it can. >>> >>> See the wiki for more information on running weewx with an RPi >>> https://github.com/weewx/weewx/wiki/Raspberry-Pi >>> >>> >>> >>> >>> On Wednesday, 23 May 2018 15:54:09 UTC+3, iss....@gmail.com wrote: >>>> >>>> I am running WeeWX on a Raspberry Pi 3 connected to a Vantage Pro2 >>>> Station. >>>> >>>> If I power down the Pi, when I power it back up the time on the >>>> Vantage Pro is incorrect and is set to the time the Pi was powered down. >>>> >>>> This, I assume, is due to the fact the Pi does not have a RTC and gets >>>> its time from the network. >>>> I also assume that WeeWX is starting before the network is up. >>>> >>>> What is the best way to get the correct time to the Vantage >>>> >>>> >>>> Thanks >>>> >>>> >>>> -- 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 weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
