Re: Using a serial port
On Fri, Jun 17, 2022 at 06:45:02PM -0500, Steve Fatula wrote:
> Is there anyway to get an attached serial port working on Debian and
> raspberry PI 4? It appears the tested installs want to use it as a serial
> console, I do not. I want to use UART1, the PL011, as an RS232 port to a
> projector.
>
> I can do this using Raspberry OS, but, not Debian using the tested installs.
> There is no way to disable Bluetooth via the overlays used on Raspberry OS.
> I can sort of mess around and stop the console from being started on ttyS1,
> but no way to use the port as a serial port to send and received data.
> Apparently the dtoverlays are not there.
>
> So, is there any way to really use a serial port, attached to any GPIO pins,
> as a real RS232 port using Debian images? if so, what do I need to disable
> or enable?
>
> As mentioned, had it working on Raspberry OS which is based on Bullseye. But
> unfortunately I can't use Raspberry OS for our usage.
>From what I have read you should be able to enable uart2 through uart5
on the Pi4B using the dts overlays. I don't have a Pi4 yet so no
experience with doing that unfortunately.
https://forums.raspberrypi.com/viewtopic.php?t=244827 seems to have some
talk about it though.
--
Len Sorensen
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