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.
