Serial Monitor & Output

The Output Panel at the bottom of the screen is essential for debugging and verifying your code.

Console Tab

The Console displays system messages, compilation logs, and upload progress.

Compilation: When you click Verify, the compiler output streams here. Look for "Success" or error messages.
Upload: Shows the progress of flashing the binary to the board (e.g., "Writing at 0x0000... (100%)").

Serial Monitor Tab

The Serial Monitor allows you to communicate with your Arduino board over USB.

Setup

Open: Click the Terminal icon in the header or press Ctrl/Cmd + M.
Baud Rate: Ensure the baud rate dropdown (bottom right of the panel) matches the Serial.begin(RATE) in your setup() function.
- Default is 115200.
- Common values: 9600, 57600, 115200.

Sending Data

Input Field: Type commands or text in the input bar at the bottom of the panel.
Send: Press Enter or click the "Send" button.
Line Endings: You can configure line endings (No line ending, Newline, Carriage return, Both NL & CR) in the settings menu.

Viewing Output

Auto-scroll: The monitor automatically scrolls to the newest message. Toggle the "Lock" icon to stop auto-scrolling.
Clear: Click the "Trash" icon to clear the current output.
Timestamps: Toggle the "Clock" icon to show/hide timestamps for each received message.

Troubleshooting

"Port Busy" or "Access Denied"

Make sure no other software (like the desktop Arduino IDE or Cura) is using the port.
Try unplugging and replugging the USB cable.
Refresh the browser page.

Garbage Characters

If you see weird symbols (e.g., ``), your Baud Rate is likely mismatched. Check your Serial.begin() value and match it in the dropdown.