Arduino Uno R3: A Beginner’s Guide

Learn the basics of working with the Arduino Uno R3 with simple board connection and coding.

Materials Needed

Arduino Uno R3 with cable.
1x Breadboard Solderless.
1x LED.
2x Jumper.

Connecting Your Arduino Uno R3

Follow these steps to connect your Arduino Uno R3 to your computer:

1. Connect your Arduino Uno R3 to your computer using a USB cable.
2. Open the Arduino IDE on your computer.
3. Select the correct board and port from the Tools menu.

Search for Arduino Uno board and port that you connect then press “OK”.

Step 1

Connect a jumper to board and GND

Step 2

Connect a jumper to board and pin number 2

Step 3

Connect LED to board between two jumpers while positive side connected to jumper pin number 2 and negative side to jumper GND

Simple Programming Example

Basic code to get you started with IoT programming:


//LearnIoT Academy
//Open Close LED
int led = 2;    //LED pin numbers
void setup() {
    pinMode(led, OUTPUT); // Initialize the LED pin as an output
}

void loop() {
    digitalWrite(led, HIGH); // Turn the LED on
    delay(1000);             // Wait for a second
    digitalWrite(led, LOW);  // Turn the LED off
    delay(1000);             // Wait for a second
}

To Execute code to Arduino Uno R3

Below is a reference image for the wiring of the LED:

Summary

After uploading the code to Arduino Uno R3. The LED will be light up for 1 seconds and then off for 1 seconds.

Basic LED