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.
