On Thu, Jul 22, 2021 at 01:23:15PM +0200, Sven Seeberg wrote:
> Hi all,
>
> I'm trying to communicate between a Raspberry Pi (3B, 3B+, 4B) on
> OpenBSD 6.9 and an Arduino with the built in (GPIO) serial interface.
> With the Raspi 3B version, the serial interface definitely seems to be
> work. I can use the console when connecting my laptop to the UART pins
> of the Raspi and:
>
> boot> set tty com0
>
> Now I do not want to communicate with the Arduino. The tty should not
> block the serial interface:
>
> boot> set tty fb0
>
> However, when I try to use any available serial interface, I always get
> an error message:
>
> # cu /dev/cuaU0 -s 115200
> cu: open("/dev/cuaU0"): Device not configured
>
> This repeats for all available devices.
>
> Has someone successfully used the serial device? Any hints?
>
> Thanks
> Sven
>
/dev/cuaU0 is for USB connected serial devices. From the demsg, you
should be able to figure out you are suppose to use a com(4)
interface. The device wil then be /dev/cua00 (or higher number).
-Otto
