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Topic: Can't view serial monitor window (anymore...) (Read 3366 times) previous topic - next topic


I just updated Java to version 7 and I can no longer see/view the serial monitor window.  The serial monitor itself opens and begins communicating with my board, but I can't view it.  In my windows task bar I can see the "mini window" and I see it running the sketch.  The TX light on my micro lights up once I open the serial monitor.  In the small task bar window I can see the serial monitor updating every second as its supposed to (patiently waiting for me to input the unix time). 

I'm running Windows 7, Arduino 1.0.3, using a Micro board, and have a RTC connected.  I tried uninstalling Java 7 and reverting back to Java 6 to no avail....  I tried searching for people having similar issues and couldn't find anything. 

This is driving me crazy!  Any help would be greatly appreciated!!!

Coding Badly

Open a command shell.  Run[font=Courier New] SET [/font](no arguments).  Any Java environment variables defined (like[font=Courier New] JAVA_HOME [/font]or[font=Courier New] CLASSPATH[/font])?


Thank you very much for the response.  I inadvertently figured it out... still have no idea what was happening, but its working now.

Thanks again! 


I've got this problem too!  What's the fix???? Thanks


i got this too. what should i do?
i didn't understand with the way on replied #1.

i hope there is another way, to solve this problem. Thanks


It is likely that it is running in the background. If you are working in Windows Operating Sytem, open Task Manager -> 'Applications' tab and right click on the Serial Monitor window instance and select "Bring to Front" option.


Jul 18, 2015, 12:03 pm Last Edit: Jul 19, 2015, 05:15 am by ej908
I finally found the solution for this problem.
I was having this problem for a while too and it was bugging me. It is actually quite simple.

1. Open Arduino
2. Click the serial monitor. (Of course you need to have the arduino plugged in and on the correct port)
3. Press "Windows Key+P" to open up the projector settings.
4. Change it to "extend".
5. Then change it back to "PC screen only"
6. You should be able to see the serial monitor now.

That should fix it. As I said it is pretty simple.

- Ej


Hey guys!

I just found a solution. I had the same problem and i couldnt figure out how to fix it.
I started the Task Manager / Job List, i found the "Java (TM) Platform SE Binary" almost in the top. I unfolded it and right-clicked the one with my COM in it. Eg. COM3 (Arduino/Genuino Uno). And clicked "maximize". And then i could see it!


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