Openhab 2.5.5, raspberry pi 4 with usb boot ssd

[CraigDubya]

@TRS-80

It works!
What the hell did I do? I wish I knew!!!
So, I came back after my break. I decided that I really needed to get Arduino IDE up and running so I could use the Serial Monitor. I uninstalled Arduino using - sudo apt-get remove arduino.
Then, I downloaded the Linux Arm 32-bit version of Arduino from there website and installed it from the download file which got me up and running with it.
The IDE allowed me to choose /dev/ttyUSB0 as a port, but when I opened the serial monitor the error message displayed port not found. I did a ls /dev/tty* and indeed the port was missing.
I unplugged the serial gateway, and plugged it back in
Then /dev/tty* showed it in the list, but this time it was in yellow text like all the other ports, instead of blue(?)
I then did - sudo chmod a+rw /dev/ttyUSB0 (thought we did this earlier? - can't remember)
Back to Openhab PaperUI and inbox search for my sensors and it found my sensors!

I'm confused how I got here, but at least now I know it works with all the changes I had made :upside_down_face:

[TRS-80]

That's great news! Now back to the fun part! :)

I prefer to have a repeatable, definable failure mode, and then fix that, rather than an unknown success, but that's just me. :D