Hi

Thanks for the report. The issue looks like we can't find the bossca tool which is why we see this variable unresolved when the upload happens {runtime.tools.bossac-1.7.0.path}

We will test and resolve over the next few days. In the meantime in the arduino ide you can enable "external editor" in file preferences and have the same sketch open in both vs and arduino at the same time. this means you can click upload in arduino.

Thank you for the response...you were correct.  I missed loading the Arduino SAMD packages.  I had to remove everything and restart Visual Studio before adding back in.  Rescanning wasn't working.  After though I was able to load to the board. 

Still have trouble now getting the Serial Monitor to connect.  Fails to open port.  I do have it switched onto the right port and the correct baud rate set.

Reguardless of Arduino or Visual Studio, I have to put the board in bootloader mode to load it and that comes across as COM6.  Once flashed and running it switches to COM7.  With Arduino IDE though I can switch over and connect the serial monitor just fine.  Visual Studio fails to open the port. 

Further attempts to upload via Visual Studio fail as it appears the ports are now locked but I can't figure out what locked them.  I posted an update of where it's failing now.  I'm sure it's me, I just don't know what I've done.

The reason I believe something is connecting and not letting go is my sketch isn't supposed to start until there is a serial connection which does just that when loaded through Arduino.  When I successfully loaded through Visual Studio the sketch ran immediately.  Is there something else with Visual Micro that connects serially after load?  A debugger for instances?  Is that grabbing the port and not allowing the Serial Monitor to connect?  Something seems to be connecting serially right after loading.


I noticed the "Help" message when you hover over "Connect" that it starts a debug automatically.  That's what sparked my question above about a debugger.  I see not other indication a debugger is running.  I'm quite familiar with Visual Studio but my first using it for Arduino development.

Thoughts on this next issue?

I was a little premature saying I got past the issues.  It's flacky.  It will work but then I need to reboot the whole machine again because it seems like something retains hold on the port.  I fully disconnect the board, repower it, reset it...nothing seems to change.  Windows shows the device appearing and disappearing but still can't actually upload to the device nor connect a serial connection.  Everything looks the same as my previous uploads of the build process accept these final lines.

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