COM port issue

[lamqhoang]

I have issues with the COM port recently.
The COM port list does not show up when I click on the "Select Serial Port". I can set the COM port in the setting json and upload to Arduino board without issue. But if I try to open the port, the error message below show up.

Failed to open serial port COM4 due to error: + TypeError: Cannot read property 'close' of null

VScode and arduino extension are updated to latest version. The COM port is not in used

[czgtest]

@lamqhoang VSCode insider will repro on this issue, Can you use VSCode stable ?

VSCode insider has been upgraded to node.js >8.0 , This will have breaking changes on the native module on vscode arduino. we will fix this issue next.

[lamqhoang]

This issue is resolved in the latest VSCode insider.

[czgtest]

The Nodejs of VSCode insider is reverted to 7.9, so it work well now.

[kjcolley7]

I believe this issue is present again in recent VSCode Insiders versions. Happens to me on 1.31.0-insider for Mac.

Snippet from Developer Tools:

TypeError: Cannot read property 'close' of null
	at Object.<anonymous> (bindings.js:27)
	at Object.<anonymous> (bindings.js:46)
	at Module.t._initNodeRequire.r._compile (loader.js:721)
	at Object.Module._extensions..js (internal/modules/cjs/loader.js:722)
...

This exception is generated from the node-usb-native library.

Update

I just installed the standard VSCode (non-insiders) and both the serial port selection dialog and serial monitor are working there. It appears that it is only broken on VSCode Insiders.

[Sneezry]

@kjcolley7 this issue has been fixed with #731, and you can use Arduino extension in insiders with next release.

Getting the error in latest insiders version.
Failed to open serial port COM3 due to error: + TypeError: Cannot read property 'close' of null

[doddydigitaldesign]

I'm having the same error as @bluefate .
VSCode-Insiders version: 1.36.0

[q10359443]

[q10359443]

I found the same mistake
VSCode-Insiders version: 1.36.0-insider

VSCode version: 1.36.0

[q10359443]

@lamqhoang @czgtest