User Manual

Please let us know in the forums if you test thi.s

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.

Norton anti-virus can interfere with CIRCUITPY . A user has reported this problem on Windows 7. The user turned off

both Smart Firewall and Auto Protect, and CIRCUITPY then appeared.

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

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.