Easiest way to connect LCD screen to Arduino mega!

NO wires are required, This makes it interesting. (without I2c module).

May 11, 2022

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easy methods

lcd screen

Devices & Components

Arduino Mega 2560 Rev3

Alphanumeric LCD, 16 x 2

Software & Tools

Arduino IDE

Project description

Code

The code

c_cpp

Just upload it. remove the part of code to print to get a snippet

1#include <LiquidCrystal.h>
2
3// initialize the library by associating  any needed LCD interface pin
4// with the arduino pin number it is connected to
5const  int rs = A3, en = A5, d4 = A9, d5 = A10, d6 = A11, d7 = A12;
6LiquidCrystal lcd(rs,  en, d4, d5, d6, d7);
7
8void setup() {
9  pinMode(A14,OUTPUT);
10  pinMode(A13,OUTPUT);
11   pinMode(A4,OUTPUT);
12   pinMode(A0,OUTPUT);
13   pinMode(A2,OUTPUT);
14   pinMode(A1,OUTPUT);
15   
16  digitalWrite(A14,LOW); 
17  digitalWrite(A13,HIGH); 
18   digitalWrite(A4,LOW);  
19   digitalWrite(A0,LOW);
20   digitalWrite(A2,LOW);
21   digitalWrite(A1,HIGH);
22   
23  lcd.begin(16, 2);
24  // Print a message to the LCD.
25  lcd.print("Hello,  World!");
26
27}
28
29void loop() {
30  // set the cursor to column 0, line  1
31  // (note: line 1 is the second row, since counting begins with 0):
32  lcd.setCursor(0,  1);
33  // print the number of seconds since reset:
34  lcd.print(millis() / 1000);
35}
36

#include <LiquidCrystal.h>

// initialize the library by associating  any needed LCD interface pin
// with the arduino pin number it is connected to
const  int rs = A3, en = A5, d4 = A9, d5 = A10, d6 = A11, d7 = A12;
LiquidCrystal lcd(rs,  en, d4, d5, d6, d7);

void setup() {
  pinMode(A14,OUTPUT);
  pinMode(A13,OUTPUT);
   pinMode(A4,OUTPUT);
   pinMode(A0,OUTPUT);
   pinMode(A2,OUTPUT);
   pinMode(A1,OUTPUT);
   
  digitalWrite(A14,LOW); 
  digitalWrite(A13,HIGH); 
   digitalWrite(A4,LOW);  
   digitalWrite(A0,LOW);
   digitalWrite(A2,LOW);
   digitalWrite(A1,HIGH);
   
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Hello,  World!");

}

void loop() {
  // set the cursor to column 0, line  1
  // (note: line 1 is the second row, since counting begins with 0):
  lcd.setCursor(0,  1);
  // print the number of seconds since reset:
  lcd.print(millis() / 1000);
}

Downloadable files

Circuit connection.

Wires are just to Indicate. Not needed actually.

Circuit connection.

Wires are just to Indicate. Not needed actually.

Circuit connection.

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arunav1

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