This one should do just fine. https://www.amazon.com/dp/B00ZOXWHK4/ref=cm_sw_r_cp_awdb_t1_I4CbBbHK8NDYP
Dave-KB1PVH Sent from my Galaxy S9 On Wed, May 23, 2018, 16:18 <iss.we...@gmail.com> wrote: > 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. > -- 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.
