Arduino serial communication is one of the many ways Arduino talks to other devices. Arduino uses asynchronous serial communication to send-receive data to and from other devices. Arduino Uno supports serial communication via on-board UART port and Tx/Rx pins. Generally this transmission happens at 9600 bits per second which is termed as baud rate. [caption id=”attachment_840” align=”aligncenter” width=”424”] Arduino Uno Shown with UART port and Tx,Rx Pins[/caption] Arduino may communicate with many devices including:

• Another Arduino
• A computer
• LCD display
• Modem
• Or any device that supports serial communication

How to do it? In this example we’ll connect Arduino and a computer using UART port. For this we are going to use Arduino IDE’s Serial Monitor. Serial Monitor will display data we sent from Arduino Uno. Code:

void setup() {
Serial.begin(9600);
}

void loop() {
Serial.println(“Hello World…”);
delay(1000);
}

Upload this code and select Tools > Serial Monitor (Shift+Ctrl+M). You should see this output. [caption id=”attachment_841” align=”alignnone” width=”579”] Serial Monitor output on the computer[/caption] Further Reading:

1. Wikipedia: Serial communication
2. Arduino Reference: Serial

Writing Hello World is a custom I dare not to break as I start off with this brand new blog. Here are Hello World programs in ten different programming languages.

1. The C Not only C can be termed as mother of most high level languages but it remains relevant till date. It is undoubtedly the most popular language of all times.

1
2
3

#include void main() {
    printf("Hello World!");
} 

2. C ++ Bjarne Stroustrup’s language gave programmers a new world view with Object Oriented Programming.

1
2
3

#include void main() {
   cout << "Hello World!";
} 

3. UNIX Shell Shell is like a Ninja’s sword! You need to see this.

1
2

#!/bin/sh
echo "Hello World!"

4. Java Java is perhaps the only ubiquitous multi platform language we have seen.

1
2
3
4
5

public class HelloWorld {
    public static void main(String args \[\]) {
       System.out.print("Hello World!");
    }
}

5. Hello World in C# C# is a great programming language based on C from Microsoft.

1
2
3
4
5

public class HelloWorld {
    static void Main() {
       System.Console.Write("Hello World!");
    }
}

6. JavaScript JS shaped platforms which employ half of the Indian programmers.

1

alert ("Hello World");

7. PHP PHP makes great front-ends for web applications.

1

echo "Hello World!";

8. Python My favourite! Python is simple, readable and powerful.

1

print ('Hello World!')

9. PL/SQL When you cannot think in SQL, you use PL/SQL!

1
2
3

begin
    dbms\_output.put\_line ('Hello World!');
end;

10. Arduino C Arduino propels IoT development with affordable open source prototyping boards for everyone. Arduino-C is indeed C!

1
2
3
4
5
6
7
8
9
10
11
12
13

// setup () function runs only once
void setup() {
  // Use on-board LED as output
  pinMode(LED\_BUILTIN, OUTPUT);
}

// loop function runs forever
void loop() {
  digitalWrite(LED\_BUILTIN, HIGH);   // turn the LED on
      delay(1000);                       // wait a sec (or 1000 ms)
  digitalWrite(LED\_BUILTIN, LOW);    // turn the LED off
      delay(1000);                       // wait a sec (or 1000 ms)
}

So this is how journey at iDevji starts, I hope it will create value, may be little, for everyone specially my students!