On Wed, Jul 30, 2025 at 08:48:05PM -0400, Steve Dondley 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? > > mick > > I’ve only played with arduino once and never a Raspberry pi (I think it has a > ton of different ports) and it probably depends on the model. So I can’t be > of much help there. > > How many pins does it have? If it’s a 9 pin arranged in two rows then it’s > definitely a serial port. If it’s got 15 pins in three rows it’s probably a > vga serial port for the monitor.
If it has 25 pins in 2 rows it is prolly a serial port - but usually only a few of the pins were connected: https://en.wikipedia.org/wiki/Serial_communication These were bits of kit that were around for decades; how they were used, wired up, etc changed over time. To see how it is used on a particular device you need to look at the documentation. -- Alain Williams Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer. +44 (0) 787 668 0256 https://www.phcomp.co.uk/ Parliament Hill Computers. Registration Information: https://www.phcomp.co.uk/Contact.html #include <std_disclaimer.h>
