FDTI breakout (2 types) cause USB acess denial

Development Tools IDE 1.x
1

Attempting to upload to Pro Mini via FTDI "Basic" as well as FTD1232 constantly fails. Any further attempt to use any FTDI breakout fails because "ACCESS is Denied". "Any", here, means changing to any another FTDI unit. On occasion, full reboot (W10/64) may unblock the ports.

Note1: changing FTDI units (resulting in a change in the USB port) does NOT make the "new" port available.
Note 2: uploads (and attempts to "Burn Bootloader") fail on failure to find programmer and/or no sync.

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Hi @tmkane. This bug is being tracked by the Arduino IDE developers here:

If you have a GitHub account, you can subscribe to that issue to get notifications of any new developments related to this subject.

The workaround is to close the "Serial Monitor" tab in the bottom panel of Arduino IDE each time before making an upload:

  1. Click the X icon on the "Serial Monitor" tab in the bottom panel of the Arduino IDE window to close the tab:
    image
  2. Upload the sketch.
  3. Open Serial Monitor again if needed (by clicking the icon on the IDE toolbar or the Tools > Serial Monitor menu item) after the upload is finished.
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I will check out a Github account. Thanks. Aswell, I will watch for comments from the IDE development people.

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You are welcome. I'm glad if I was able to be of assistance.

Regards,
Per

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Added info: On my screen (IDE 2.0.3 / Windows 10/64) the "X" is not as shown above. An 'x' appears at the right of the "output serial" line, and selecting it does not clear the USB block.

But, I tried (and succeeded) in clearing the USB block by using the IDE Tool menu and selecting "Serial Monitor" to turn off the Serial Monitor, and thereby gain access to the USB port.

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The screenshot shows two tabs in the bottom panel:

  • Serial Monitor
  • Output

They work just like tabs in your web browser or other applications.

If you haven't done anything to generate output, or have already closed the Output view, then you won't have an Output tab. The two tabs might also occur in the opposite order, depending on which order you opened them in, or the order you dragged them into.

I'm glad you succeeded after all.

Selecting Tools > Serial Monitor from the Arduino IDE menus or clicking the Serial Monitor button on the IDE toolbar are other ways of closing the Serial Monitor view if it is already open. The important thing to note is that these toggle Serial Monitor, so if it is already closed then doing that will open Serial Monitor instead of closing it.

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