Select all the devices you want to remove, and then press Delete. It is usually safe
just to select everything. Any device that is removed will get a fresh install when you
plug it in. Using the Device Cleanup Tool also discards all the COM port assignments
for the unplugged boards. If you have used many Arduino and CircuitPython boards,
you have probably seen higher and higher COM port numbers used, seemingly
without end. This will fix that problem.
Serial Console in Mu Not Displaying
Anything
There are times when the serial console will accurately not display anything, such as,
when no code is currently running, or when code with no serial output is already
running before you open the console. However, if you find yourself in a situation
where you feel it should be displaying something like an error, consider the following.
Depending on the size of your screen or Mu window, when you open the serial
console, the serial console panel may be very small. This can be a problem. A basic
CircuitPython error takes 10 lines to display!
Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.
code.py output:
Traceback (most recent call last):
File "code.py", line 7
SyntaxError: invalid syntax
Press any key to enter the REPL. Use CTRL-D to reload.
More complex errors take even more lines!
Therefore, if your serial console panel is five lines tall or less, you may only see blank
lines or blank lines followed by Press any key to enter the REPL. Use CTRL-D
to reload. . If this is the case, you need to either mouse over the top of the panel to
utilise the option to resize the serial panel, or use the scrollbar on the right side to
scroll up and find your message.
This applies to any kind of serial output whether it be error messages or print
statements. So before you start trying to debug your problem on the hardware side,
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