Modifications

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 <a href="https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1473246">you are hitting this issue.</a>

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 <a href="https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1473246">you are hitting this issue.</a>

The fix for this issue is to make sure Adafruit's custom udev rules are applied to your system.  One of these rules is made to configure modem manager not to touch the Feather board and will fix the programming difficulty issue.  <a href="../../../../adafruit-arduino-ide-setup/linux-setup#udev-rules">Follow the steps for installing Adafruit's udev rules on this page.</a>

The fix for this issue is to make sure Adafruit's custom udev rules are applied to your system.  One of these rules is made to configure modem manager not to touch the Feather board and will fix the programming difficulty issue.  [https://learn.adafruit.com/adafruit-arduino-ide-setup/linux-setup#udev-rules Follow the steps for installing Adafruit's udev rules on this page.]

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