My serial monitor isn't working

[minasylla123]

[UKHeliBob]

Welcome to the forum

The error message suggests a solution to the problem

Have you got a board and serial port selected in the IDE ?

[minasylla123]

My board and serial port is selected in the IDE

[UKHeliBob]

The IDE obviously does not agree with you

Please post a snip of your IDE screen showing the equivalent of this

[minasylla123]

[ptillisch]

Hi @minasylla123. I'm going to ask you to provide some additional information that might help us to identify the problem.

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This procedure is not intended to solve the problem. The purpose is to gather more information.

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Please do this:

1. Select Arduino IDE > Quit Arduino IDE from the Arduino IDE menus if it is running.
2. Open macOS Launchpad.
3. Type terminal in the "Search" field.
4. Click on the "Terminal" icon.
   A "zsh" window will open.
5. Type the following command in the zsh window:

   "/Applications/Arduino IDE.app/Contents/MacOS/Arduino IDE"
   

6. Press the Enter key
7. Wait for Arduino IDE to finish starting.
8. Connect your Uno board to the computer with a USB cable if it is not already connected.
9. Make sure the serial port of the board is selected in Arduino IDE's Tools > Port menu.
10. Verify that the "Serial Monitor" tab shows the unexpected "Not connected ..." message, as before.
11. Switch back to the Terminal window.
12. Press the Command+A keyboard shortcut.
    This will select all the text in the Terminal window.
13. Press the Command+C keyboard shortcut.
    This will copy the selected text to the clipboard.
14. Open a forum reply here by clicking the "Reply" button.
15. Click the <CODE/> icon on the post composer toolbar.
    This will add the forum's code block markup (```) to your reply to make sure the output is correctly formatted.
    
    
16. Press the Command+V keyboard shortcut.
    This will paste the output into the code block.
17. Move the cursor outside of the code block markup before you add any additional text to your reply.
18. Click the "Reply" button to post the output.

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Please let me know if you have any questions or problems while following those instructions.