Hard Disk Sentinel
Kaspersky anti-virus: To fix, you may need to disable Kaspersky completely. Disabling some aspects of
Kaspersky does not always solve the problem. This problem has been reported to Kaspersky.
CIRCUITPY Drive Does Not Appear
Kaspersky anti-virus can block the appearance of the CIRCUITPY drive. We haven't yet figured out a settings change
that prevents this. Complete uninstallation of Kaspersky fixes the 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!
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, be sure to check that you haven't simply missed the serial messages due to
serial output panel height.
CircuitPython RGB Status Light
The Feather M0 Express, Feather M4 Express, Metro M0 Express, Metro M4 Express, ItsyBitsy M0 Express, ItsyBitsy M4
Express, Gemma M0, and Trinket M0 all have a single NeoPixel or DotStar RGB LED on the board that indicates the
status of CircuitPython.
Circuit Playground Express does NOT have a status LED. The LEDs will pulse green when in the bootloader. They do
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