Arduino IDE 2.0 Bets Processor drop down not present

Development Tools IDE 2.x
9

Thanks so much for informing us of this issue @Richard_Brown!

I have now submitted a formal bug report to the IDE developers:

The workaround is to install the Sanguino boards platform using the Arduino Boards Manager. I'll provide instructions:

  1. Close all Arduino IDE 2.x windows.
  2. Uninstall the manually installed version of the Sanguino boards platform by deleting this folder:
    <sketchbook folder>/hardware/Sanguino
    If you don't know it, you can find the location of the sketchbook folder in the Arduino IDE by opening File > Preferences from the menus and then checking the path shown in the "Sketchbook location" preference.
    Please be very careful when deleting things from your computer. When in doubt, back up!
  3. Start Arduino IDE 2.x.
  4. Select File > Preferences from the Arduino IDE menus.
  5. Add the following URL to the "Additional Boards Manager URLs field:
    https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
    If you have multiple Additional Boards Manager URLs, separate them with commas.
  6. Click the OK button.
  7. Close all Arduino IDE 2.x windows.
  8. Start Arduino IDE 2.x.
    (this is needed because of a bug where the newly added Boards Manager URLs are only recognized after you restart the IDE)
  9. Select Tools > Board > Boards Manager from the Arduino IDE menus.
    The Boards Manager side bar will now open in the Arduino IDE.
  10. In the search field, type sanguino
  11. From the list of search results, click on "Sanguino by Kristian Sloth Lauszus".
  12. Click the INSTALL button.
  13. Wait for the installation to finish
    "Platform Sanguino:avr@1.0.3 installed" will be shown in the IDE's "Output" pane.

After doing that, you should now be able to select Tools > Board > Sanguino > Sanguino from the Arduino IDE menus and then see the expected "Tools > Processor".