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Can not communicate with Arduino Mega

I can not make it work no matter what I try: Arduino Mega and Labview.

Arduino Mega works fine with IDE. So must be LV problem.


I tried LV 21, 21SP1, 22, 22Q3 and 23 with matching Hobbyists Toolkit,  and LV 21 with Linx Toolkit via VIPM. All was tried separately on clean Win install (without any traces of other LV versions), with IDE installed and not ---> lots of time wasted 😑 


Toolkit Firmware wizard seems to work fine, Arduino Tx/Rx leds blinking but no luck with running any example/code afterwards.

It worked some 2 times with LV21 and LV23, but I was not able to make it work again since or on second run.


Constant error:

"LabVIEW was unable to connect to the LINX device using the following settings:
Interface: Serial
COM Port: COM3"


I wonder if anyone has any suggestions?

Perhaps I overlook something? but is suppose to work out of the box, isn't it?

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