My RGB NeoPixel/DotStar LED is blinking funny colors -
what does it mean?
The status LED can tell you what's going on with your CircuitPython board. Read
more here for what the colors mean!()
Memory Issues
What is a MemoryError?
Memory allocation errors happen when you're trying to store too much on the
board. The CircuitPython microcontroller boards have a limited amount of memory
available. You can have about 250 lines of code on the M0 Express boards. If you
try to import too many libraries, a combination of large libraries, or run a program
with too many lines of code, your code will fail to run and you will receive a
MemoryError in the serial console.
What do I do when I encounter a MemoryError?
Try resetting your board. Each time you reset the board, it reallocates the memory.
While this is unlikely to resolve your issue, it's a simple step and is worth trying.
Make sure you are using .mpy versions of libraries. All of the CircuitPython libraries
are available in the bundle in a .mpy format which takes up less memory than .py
format. Be sure that you're using the latest library bundle() for your version of
CircuitPython.
If that does not resolve your issue, try shortening your code. Shorten comments,
remove extraneous or unneeded code, or any other clean up you can do to
shorten your code. If you're using a lot of functions, you could try moving those
into a separate library, creating a .mpy of that library, and importing it into your
code.
You can turn your entire file into a .mpy and import that into code.py. This means
you will be unable to edit your code live on the board, but it can save you space.
Can the order of my import statements affect memory?
It can because the memory gets fragmented differently depending on allocation
order and the size of objects. Loading .mpy files uses less memory so its
recommended to do that for files you aren't editing.
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