On 2025-07-31 01:46, Greg Wooledge wrote:
On Thu, Jul 31, 2025 at 01:38:15 +0100, mick.crane wrote:
serial console/ parallel is likely me not understanding terminology.
These Raspberry Pis, Arduinos with the connection with all the pins,
what
protocol is that expecting?
A serial cable usually has a 9-pin (DB-9) connector on each end.
A parallel cable usually has a 25-pin (DB-25) connector on one end,
and either another DB-25 connector or a mini-Centronix connector on the
other end.
See pictures at <https://en.wikipedia.org/wiki/Parallel_port>.
Typically, parallel ports have been used for printers. The Iomega Zip
drive also had a parallel port interface, but wasn't super popular.
I had two or three of those Iomega zip drives, must have been handy for
something.
Serial ports have commonly been used for teletypes/terminals, mice,
and a wide variety of other instruments and devices.
I find that with instructions the basic stuff ( like why) is often
missing.
So with these Blackberry Pis, Arduinos the thing with all the pins is a
parallel port for sending and receiving signals to control some other
device and there's some other connection to connect to a console
emulation on a PC, and keyboard on PC sends instructions via console
emulation?
mick
