IDE 2.0.1 Sort of doesn't recognize UNO

Development Tools IDE 1.x
1

Hi,

I've for the IDE 2.0.1 installed. Appears UNO is on COM3 (see images). But when I try uploading a simple sketch, I get the following error msg:

Request getBoardDetails failed with message: 5 NOT_FOUND: Unknown FQBN: board arduino:avr:uno not found

Any ideas what's going on?
image 1

image 2

2

Hi @project_science. This error occurs when you haven't installed the "Arduino AVR Boards" platform of your Uno.

I'll provide instructions for installing it:

  1. Select Tools > Board > Boards Manager from the Arduino IDE menus to open the "Boards Manager" view in the left side panel.
  2. Scroll down through the list of boards platforms until you see the "Arduino AVR Boards" entry.
  3. You will see an "INSTALL" button at the bottom of the entry. Click that button.
  4. Wait for the installation to finish.

Now try uploading to your Uno board again. The error should no longer occur.

I am a bit surprised that you ended up in this situation. Normally when you select a board that doesn't have an installed platform, Arduino IDE shows a notification at the bottom right corner of the window that explains this requirement and offers to install it:

image

Did the IDE show that notification?

3

Thanks for your reply. I didn't get the error screen you posted. What confuses me is that I think I already have the Arduino AVR Boards installed (see image), correct me if I'm missing something here. (Note I've tried this with 2 different UNOs, same error as I originally posted.)

image A
image A1154×317 23.2 KB

4

Might not be on COM3, but I'll defer to Per.

Do you have any other COM ports recognised?

A

5

I see you have a modified copy of the platform manually installed to your sketchbook. This copy is overriding the copy the Arduino IDE 2.x installs on the first run. This causes the error because the modified copy only contains two boards: Micro and Diecimila. So it won't work for your Uno.

Please try this:

  1. Select File > Preferences... from the Arduino IDE menus.
  2. Take note of the path shown in the "Sketchbook Location" field of the "Preferences" dialog.
  3. Click the Cancel button.
  4. Select File > Quit from the Arduino IDE menus.
  5. Open the folder at the path from the "sketchbook location" preference in Windows "File Explorer".
  6. Open the hardware subfolder.
  7. You should now see a folder named arduino. Rename that folder to arduino-dev
  8. Start Arduino IDE.

Now try uploading to your Uno again. Hopefully the error will no longer occur.

My instructions were designed to allow you to keep this modified manually installed boards platform, but to make it so that it doesn't interfere with the official "Arduino AVR Boards" installation. Because of this, when you open the Tools > Board menu in the Arduino IDE, you will find that there is an "Arduino AVR Boards" entry (which contains the boards of the official platform), and an "Arduino AVR Boards (in Sketchbook)" entry (which contains the boards of the modified platform).

6

This worked, and I thank for your input, much appreciated to help me get going!

7

You are welcome. I'm glad it is working now.

Regards,
Per