Final answer:
To download COM 3 or 4 in Arduino, connect your Arduino board to your computer and select the appropriate COM port in the Arduino software.
Step-by-step explanation:
How to download COM 3 or 4 in Arduino?
To download COM 3 or 4 in Arduino, you will need to follow these steps:
- Connect your Arduino board to your computer using a USB cable.
- Open the Arduino software on your computer.
- Go to 'Tools' and then 'Port'.
- If you see COM 3 or COM 4 in the list, select it. Otherwise, click on 'Refresh'.
- Once you have selected the correct COM port, you can now upload your code to the Arduino board.
Make sure you have the correct drivers installed for your Arduino board before attempting to download it. a