Compilation Issues
If you get an alert that looks like
Cannot run program "{runtime.tools.arm-none-eabi-gcc.path}\bin\arm-non-eabi-g++"
Make sure you have installed the Arduino SAMD boards package, you need
both
Arduino & Adafruit SAMD board
packages
Manually bootloading
If you ever get in a 'weird' spot with the bootloader, or you have uploaded code that crashes and doesn't auto-reboot
into the bootloader, click the RST button twice (like a double-click)to get back into the bootloader.
The red LED will pulse, so you know that its in bootloader mode.
Once it is in bootloader mode, you can select the newly created COM/Serial port and re-try uploading.
You may need to go back and reselect the 'normal' USB serial port next time you want to use the normal upload.
Ubuntu & Linux Issue Fix
Note if you're using Ubuntu 15.04 (or perhaps other more recent Linux distributions) there is an issue with the modem
manager service which causes the Bluefruit LE micro to be difficult to program. If you run into errors like "device or
resource busy", "bad file descriptor", or "port is busy" when attempting to program then you are hitting this
issue. (https://adafru.it/sHE)
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