Arduino - Hello World

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
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Quick Steps

  • Connect Arduino to PC via USB cable.
  • Open Arduino IDE.
  • Select Arduino board
  • Arduino IDE - How to select Arduino board
  • Select Arduino serial port (number may be different)
  • Arduino IDE - How to select Arduino board
  • Type the following code
void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial.println("Hello World!"); } void loop() { // put your main code here, to run repeatedly: }
  • Click Upload button on Arduino IDE to upload code to Arduino
  • Arduino IDE - How to Upload Code
  • Open Serial Monitor by clicking the Serial Monitor icon
  • Arduino IDE - How to open serial monitor
  • See the result on Serial Monitor:
  • COM6
    Send
    Hello World!
    Autoscroll Show timestamp
    Clear output
    9600 baud  
    Newline  

Modifying Arduino Code

  • Replace “Hello World!” by any text, for example, “Arduino Get Started”.
  • Upload the code to Arduino
  • See the result on Serial Monitor
  • COM6
    Send
    Arduino Get Started
    Autoscroll Show timestamp
    Clear output
    9600 baud  
    Newline  

Congratulations!
You have just successfully taken the first step on the Arduino learning journey. Go ahead!