Whilst there are many forms of serial communication comes in many forms, this tutorial will focus on the connection that exists between an Arduino compatible device and a PC. This connection is particularly important as it allows sketches to be uploaded to the Arduino device and can be an invaluable tool for debugging your Arduino projects. Interestingly you can also use the serial port to send commands to your Arduino from a PC. To find out more about serial communications checkout this guide from Arduino Basics.
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