How to use Arduino Serial Write?

While today we will have a look at how to send the data through a serial port in Arduino and for that, I am going to use the Arduino Serial Write command. It's also going to be a very simple and basic Arduino tutorial but if you are new to Arduino then you must read it completely as it will gonna help you out. I have also designed a Proteus Simulation and explained it at the end of this tutorial. I hope you guys are gonna learn from it:

How to use Arduino Serial Write ???

• For the basics on Serial Port, you should read What is Serial Port?
• And as I have explained in my previous tutorial How to use Arduino Serial Read that Arduino has a Serial Port at its Pin # 0 and Pin # 1, as shown in the below figure:

• In the Arduino Serial Read, we have seen that How to read data coming from the serial port and we have used Pin # 0 for that purpose.
• So, now we are going to write some data on the Serial Port.
• It's like we are sending data from Arduino to some other device via Serial Port.
• For example, you are using a GSM module with Arduino then you have to send AT commands to your GSM board from Arduino and that's where you use Arduino Serial write.
• You can download the Proteus Simulation and code for Arduino Serial Write Command by clicking the below button:

• Here's the first syntax for Arduino Serial write:

• Arduino Serial Write is used to write some data on the Serial Port and it sends data in binary form.
• Here's Arduino Serial Write Syntax:

Serial.write ( 'DataSent' ) ;

where:

• DataSent is a simple byte and is used in these characters ' '. The below example code will send byte '1' on the serial port:

Serial.write ( '1' ) ;

• Now, let's write some data on Arduino Serial Port using the above syntax and see what we got.

Proteus Simulation

• So, design a Proteus Simulation as shown in the below figure:

• Upload the below code in your Arduino software and get the Hex File from Arduino.

#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(20, 4);
  // Print a message to the LCD.
  lcd.setCursor(1,0);
  lcd.print("www.TheEngineering");
  lcd.setCursor(4,1);
  lcd.print("Projects.com");
  lcd.setCursor(1,0);
  Serial.begin(9600);
  lcd.clear();
  
  Serial.write('1');
}

void loop() 
{
}

• In the above code, I have simply written a byte which you can see is 1.
• So, now upload it and run your simulation and if everything goes fine then you will get 1 on your virtual serial terminal of Proteus, as shown in the below figure:

• You can see in the above figure that we got 1 in Serial Port so now you can send whatever you want via this Arduino Serial Write Command.
• Now let's have a look at the second syntax of the Arduino Serial Write command:

• We can also send a String of bytes via Arduino Serial Write Command. Here's the syntax:

Serial.write ( "DataSent" ) ;

where:

• DataSent is a simple byte and is used in these characters " ". The below example code will send our site address on the serial port:

Serial.write ( "www.TheEngineeringProjects.com" ) ;

• Now let's sent a string of bytes through this Arduino Serial Write Command, so I have used the below code and have sent our website address via Serial Write.
• So, use the below code and get your Hex File:

#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(20, 4);
  // Print a message to the LCD.
  lcd.setCursor(1,0);
  lcd.print("www.TheEngineering");
  lcd.setCursor(4,1);
  lcd.print("Projects.com");
  lcd.setCursor(1,0);
  Serial.begin(9600);
 // lcd.clear();
  
  Serial.write("www.TheEngineeringProjects.com");
}

void loop() 
{
}

• Run your Proteus Simulation and you will get the below results:

• You can see in the above figure that we got the whole address via Serial Port.