Per Tillisch

The library is compliant with the [requirements ](https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ)of the Arduino Library Manager index. Here's what would need to be done to add this library to the Arduino Library Manager index:...

Regarding this CI failure: https://travis-ci.org/github/ROBOTIS-GIT/ros2arduino/builds/751887104#L405 ``` In file included from /home/travis/.arduino15/packages/arduino/hardware/samd/1.8.11/cores/arduino/SafeRingBuffer.h:25:0, from /home/travis/.arduino15/packages/arduino/hardware/samd/1.8.11/cores/arduino/Uart.h:23, from /home/travis/.arduino15/packages/arduino/hardware/samd/1.8.11/variants/mkr1000/variant.h:164, from /home/travis/.arduino15/packages/arduino/hardware/samd/1.8.11/cores/arduino/Arduino.h:48, from sketch/subscriber.ino.cpp:1: /home/travis/.arduino15/packages/arduino/hardware/samd/1.8.11/cores/arduino/sync.h:28:22: error: expected unqualified-id before 'for' #define synchronized for (__Guard __guard;...

See: https://github.com/arduino/Arduino/issues/3972

Which board do you have selected in the **Tools > Board** menu?

As you discovered, this library is for directly programming the ESP8266. You can't use it with your Uno.

>If there was some way for download-artifact to extract multiple artifacts into a single directory From my experiments while trying to find a way to adapt the hundreds of workflows...

>your example features a linear workflow with a known static artifact names @webknjaz as indicated by the quote in that comment, my example is specifically in response to @henryiii's comment...

Thanks for your report @flippers389. Please comment here to tell us whether you are running Arduino Firmware Uploader from the the Windows PowerShell or cmd terminal. If so, please also...

*[From @cousteaulecommandant on 2018-02-22](https://github.com/arduino/Arduino/pull/7239#issuecomment-367650093)* I think that, although the code becomes more compact and simple, it also becomes less explicit and deviates from the typical Arduino code. Keep in mind...

[*From @DRSDavidSoft on 2018-02-22*](https://github.com/arduino/Arduino/pull/7239#issuecomment-367679706) @codetheorist With the introduction of `LED_BUILTIN`, I thought this example _should_ have been modified according to your edit. However, as @cousteaulecommandant already pointed out, that' not...