I spoke (wrote) too soon. Weewx *seemed* to be working on the XCY through /dev/ttyS1 after modemmanager was purged, but it stopped working. It looks as if it was still struggling with CRC check errors. I thought the fault might have been (re-)triggered by an update to some Mint system files and applications (although none seemed likely), but reverting to the previous configuration and rebooting did not help. So it's back to /dev/ttyUSB0 via the converter, which is working as well on the XCY as on the old Dell.
On Sunday, December 13, 2020 at 2:34:40 PM UTC+13 [email protected] wrote: > copy the database file from the old machine to the new one. > > On Sat, Dec 12, 2020 at 5:24 PM kiwigander <[email protected]> wrote: > >> And for the final test before giving up on the XCY mini-PC, I ran *sudo >> apt purge modemmanager* >> >> and now weewx is working through /dev/ttyS1 on the XCY mini-PC. >> >> Some corollary of Murphy's Law says that if a problem is going to be >> solved, it will be solved by a simple manoeuvre that you ran out of time to >> try. >> >> Thank you Tom & colleagues! >> >> Now one more thing: >> >> The new server's database starts just a few minutes ago. The old >> server's database goes back quite a few years. How do I merge the previous >> data onto the new server? >> >> On Sunday, December 13, 2020 at 12:35:49 PM UTC+13 [email protected] >> wrote: >> >>> Sounds like our analysis was spot on. At least you know what the problem >>> is now! >>> >>> On Sat, Dec 12, 2020 at 2:55 PM kiwigander <[email protected]> wrote: >>> >>>> Progress report: >>>> I've got a Unitek BF-810Y USB<=>RS232 converter. Plugged it in to the >>>> old Dell; it was recognised as a pl2303 converter on ttyUSB0. Changed the >>>> relevant line in weewx.conf, restarted the daemon and we're in business. >>>> I'll have a last go at the RS232 ports on the XCY mini PC but I'm not >>>> optimistic about that unit. >>>> >>>> On Saturday, November 28, 2020 at 1:23:28 PM UTC+13 kiwigander wrote: >>>> >>>>> Thanks again for the advice and suggestions. >>>>> >>>>> I've used *stty* to see how the ever-reliable RS232 port is >>>>> configured on the old server and will try setting the new one to mimic it. >>>>> >>>>> I'll try purging modemmanager from the new server. >>>>> >>>>> Assuming, though, that the problem is defective hardware, the new >>>>> server ought to be returnable but I'd have to send it back to the PRC. I >>>>> wonder whether the serial comms module is replaceable -- that might be >>>>> more >>>>> cost-effective than sending the unit back. I'll try a USB<=>RS232 >>>>> converter anyway. >>>>> >>>>> I'll be offline for a couple of weeks but will report back. >>>>> >>>>> On Saturday, November 28, 2020 at 3:02:00 AM UTC+13 [email protected] >>>>> wrote: >>>>> >>>>>> Good point. I've had problems with modemmanager doing this. >>>>>> >>>>>> >>>>>> *sudo apt purge modemmanager* >>>>>> >>>>>> >>>>>> >>>>>> On Fri, Nov 27, 2020 at 5:57 AM Cameron D <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Have you checked that there is not any form of getty running on the >>>>>>> port - they wait for logins and will steal some of the input characters. >>>>>>> >>>>>>> That's rather old school - I don't know how systemd does it. >>>>>>> >>>>>>> >>>>>>> On Friday, 27 November 2020 at 11:00:27 pm UTC+10 [email protected] >>>>>>> wrote: >>>>>>> >>>>>>>> I think we can say with some confidence that there is something >>>>>>>> wrong with the UART chip on your new computer. Can you take it back? >>>>>>>> >>>>>>>> Alternatively, as Vince says, a serial-to-usb converter. They seem >>>>>>>> to be more reliable these days. >>>>>>>> >>>>>>>> -tk >>>>>>>> >>>>>>>> On Thu, Nov 26, 2020 at 8:47 PM kiwigander <[email protected]> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Ta. The prevalent RS232<=>USB chipset around these parts seems to >>>>>>>>> be an FTDI. I'll look around. >>>>>>>>> >>>>>>>>> On Friday, November 27, 2020 at 4:19:32 PM UTC+13 vince wrote: >>>>>>>>> >>>>>>>>>> I was hoping to avoid USB<=>RS232 converters, as I understood >>>>>>>>>>> they were problematic (in the past) and would add another >>>>>>>>>>> thing-to-go-wrong. I have one other old device to monitor and it >>>>>>>>>>> too has >>>>>>>>>>> only an RS232 interface. Thought I'd be clever and get a low power >>>>>>>>>>> box >>>>>>>>>>> with two RS232 ports. >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> FWIW, i've been running a VP2 with serial datalogger and a >>>>>>>>>> serial2usb dongle for something like 10 years now. I started with >>>>>>>>>> a >>>>>>>>>> Shuttle mini-pc that had serial ports and switched to a little arm >>>>>>>>>> box that >>>>>>>>>> just has USB. Never had an issue with the serial2usb from day one. >>>>>>>>>> Works >>>>>>>>>> great. >>>>>>>>>> >>>>>>>>>> You basically just want to make sure you get the right chipset in >>>>>>>>>> the adaptor. Anything with the PL2303 definitely works. Both mine >>>>>>>>>> have >>>>>>>>>> that chipset, and they were picked up years apart from different >>>>>>>>>> suppliers, >>>>>>>>>> so they used to be pretty much what you always got. I haven't >>>>>>>>>> looked in >>>>>>>>>> years to know if that's still the case. >>>>>>>>>> >>>>>>>>>> I'm running on a Seagate Dockstar (a 128MB RAM version of the >>>>>>>>>> original PogoPlug) with a Seagate laptop drive plugged in, and you >>>>>>>>>> can see >>>>>>>>>> the serial adaptor available in the lsusb output below. >>>>>>>>>> >>>>>>>>>> root@debian:~# lsusb >>>>>>>>>> Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 >>>>>>>>>> 4-Port HUB >>>>>>>>>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >>>>>>>>>> Bus 001 Device 003: ID 0bc2:2120 Seagate RSS LLC >>>>>>>>>> Bus 001 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 >>>>>>>>>> Serial Port >>>>>>>>>> >>>>>>>>>> >>>>>>>>> -- >>>>>>>>> >>>>>>>> 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/d7e49691-043f-4f6c-a998-dd91c3eaa34an%40googlegroups.com >>>>>>>>> >>>>>>>>> <https://groups.google.com/d/msgid/weewx-user/d7e49691-043f-4f6c-a998-dd91c3eaa34an%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/95f8e263-0d64-46de-bf3e-e6089756f45an%40googlegroups.com >>>>>>> >>>>>>> <https://groups.google.com/d/msgid/weewx-user/95f8e263-0d64-46de-bf3e-e6089756f45an%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/f1192f7e-f6f8-4221-bc5f-79da5a697868n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/weewx-user/f1192f7e-f6f8-4221-bc5f-79da5a697868n%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/454a332c-4d90-47b1-a8a0-c6ef69a11438n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/weewx-user/454a332c-4d90-47b1-a8a0-c6ef69a11438n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Peter Quinn > (415)794-2264 <(415)%20794-2264> > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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