serialEvent does not work with Leonardo (USB CDC Serial) [imported]

[cmaglie]

This is Issue 1031 moved from a Google Code project.
Added by 2012-09-03T19:30:50.000Z by pilot...@gmail.com.
Please review that bug for more context and additional comments, but update this bug.

Original labels: Type-Defect, Priority-High, Component-ATmega32U4

Original description

What steps will reproduce the problem?

1. Load Examples ... 04. Communcations... SerialEvent example
2. Add while (!Serial) ; after Serial.begin() in setup
3. Upload to a Leonardo board, type stuff in the serial monitor

What is the expected output? What do you see instead?

Expected: Get back what I typed
Actual: Got nothing back

What version of the Arduino software are you using? On what operating
system? Which Arduino board are you using?

Arduino 1.0.1 on MacOS X 10.7.4 with a Leonardo R3 board

Please provide any additional information below.

I believe serialEvent is never called. I tried renaming it to serialEvent1 and serialEvent2 without any effect.

[moonpyk]

I have this issue with Arduino 1.0.3 on Windows, using a Leonardo R3 Board.

[KaiKrause]

Same here. Arduino 1.0.3 Windows, orig. Leonardo R3

[mwsh]

Are there any news about that bug?

[matthijskooijman]

It seems this simply not implemented. Looking at the 1.5.x branch (but I think it's the same for 1.0.x), this feature is implemented by serialEventRun which is called by main()

It should be fairly easy to add this, though. Only thing that might be tricky is to detect inside main.cpp wether CDC is available, but we could always use a weak reference to detect it at runtime.

[WiredWonder]

No progress on this bug in ~4 years?

[SIRprise]

I described a fix ~4 years ago, but nobody seemed to be interested in: http://forum.arduino.cc/index.php?topic=152479.0

[NicoHood]

I think we dont need a fix and just remove this feature, as serialevent is just soo useless, as it is called inside the loop.

[facchinm]

Fixed (or, better, documented) by arduino/Arduino@e180b70 .
Anyway, serialEvent is due to deprecation, so no fixes will be applied to code not working today.

[PaulStoffregen]

If serialEvent is depreciated, maybe users could be advised not to use it on these pages?

https://www.arduino.cc/en/Tutorial/SerialEvent

https://www.arduino.cc/en/Reference.SerialEvent

[JoakimCh]

I happened to spend (waste) several hours now just to figure this out... I see no logical reason for it to work with some Arduinos and not this one, hence it not being implemented was very confusing. But I guess this is to be expected with the low quality of most of the standard Arduino libraries...