The Arduino Serial Monitor is a great tool for debugging purposes. It allows you to see what’s going on inside your Arduino code. By default, the Serial Monitor is set to 9600 baud, which is fine for most purposes. But if you want to change the baud rate, here’s how.
First, open the Arduino Serial Monitor. You can do this by clicking the icon in the upper-left corner of the Arduino IDE, or by selecting Tools > Serial Monitor from the menu.
Next, click the drop-down menu at the top of the Serial Monitor and select the baud rate you want to use. For example, if you’re using a GPS module, you’ll want to select the baud rate that it uses (usually 9600 or 115200).
Once you’ve selected the correct baud rate, you can begin sending data to the Serial Monitor. To do this, simply type something into the text box at the top of the Serial Monitor and click the Send button (or press Enter).
You should see the data you typed appear in the text box at the bottom of the Serial Monitor. If you don’t see anything, make sure you’ve selected the correct baud rate and that your Arduino is connected to your computer.
That’s all there is to using the Arduino Serial Monitor!