Tutorial do Arduino 16 × 2 LCD – Tudo o que você precisa saber

• Projeto de sistema de alarme e segurança do Arduino
• Máquina de venda automática DIY – Projeto de mecatrônica baseado em Arduino
• Medidor de alcance Arduino e projeto de nível de bolha digital

O que é a tela de caracteres LCD?

Pinagem de LCD 16×2

Como conectar o Arduino ao LCD – Diagrama de fiação

Você pode obter esses componentes em qualquer um dos sites abaixo:

• LCD de 16×2 caracteres………………………..
• Potenciômetro ……………………………….
• Placa Arduino ………………………………
• Breadboard e jump wires ……… 

Ajustando o contraste do LCD

Posso usar o LCD sem potenciômetro?

analogWrite(11,100); // Generate PWM signal at pin D11, value of 100 (out of 255)Code language: Arduino (arduino)

Código Arduino LCD

/*
* Arduino LCD Tutorial
*
* Crated by Dejan Nedelkovski,
* www.HowToMechatronics.com
*
*/

#include <LiquidCrystal.h> // includes the LiquidCrystal Library 
LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LCD object. Parameters: (rs, enable, d4, d5, d6, d7) 

void setup() { 
 lcd.begin(16,2); // Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display } 
}

void loop() { 
 lcd.print("Arduino"); // Prints "Arduino" on the LCD 
 delay(3000); // 3 seconds delay 
 lcd.setCursor(2,1); // Sets the location at which subsequent text written to the LCD will be displayed 
 lcd.print("LCD Tutorial"); 
 delay(3000); 
 lcd.clear(); // Clears the display 
 lcd.blink(); //Displays the blinking LCD cursor 
 delay(4000); 
 lcd.setCursor(7,1); 
 delay(3000); 
 lcd.noBlink(); // Turns off the blinking LCD cursor 
 lcd.cursor(); // Displays an underscore (line) at the position to which the next character will be written 
 delay(4000); 
 lcd.noCursor(); // Hides the LCD cursor 
 lcd.clear(); // Clears the LCD screen 
}Code language: Arduino (arduino)

lcd.print("Arduino"); // Prints "Arduino" on the LCDCode language: Arduino (arduino)

lcd.setCursor(2,1); // Sets the location at which subsequent text written to the LCD will be displayed Code language: Arduino (arduino)

lcd.blink(); //Displays the blinking LCD cursorCode language: Arduino (arduino)

lcd.clear(); // Clears the LCD screenCode language: Arduino (arduino)

Exemplo de texto de rolagem em LCD 16×2 e Arduino

#include <LiquidCrystal.h>

LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LCD object. Parameters: (rs, enable, d4, d5, d6, d7)

void setup() {
  lcd.begin(16, 2);
  lcd.print("Scrolling Text Example");
}
void loop() {
  lcd.scrollDisplayLeft();
  delay(500);
}Code language: Arduino (arduino)

#include <LiquidCrystal.h>

LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LCD object. Parameters: (rs, enable, d4, d5, d6, d7)

void setup() {
  lcd.begin(16, 2); // Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display

}

void loop() {
  // scroll text to the right
  for (int i = 0; i <= 13; i++) {
    lcd.setCursor(i, 0); // Sets the location at which subsequent text written to the LCD will be displayed
    lcd.print("LCD");
    delay(500); // 1 second delay
    lcd.clear(); // Write a character to the LCD
  }
  // scroll text to the left
  for (int i = 12; i >= 1; i--) {
    lcd.setCursor(i, 0);
    lcd.print("LCD");
    delay(500); 
    lcd.clear(); 
  }
}Code language: Arduino (arduino)

Como gerar e exibir caracteres personalizados no LCD

#include <LiquidCrystal.h>

byte heart[8] = {  // Array of bytes
  B00000,          // B stands for binary formatter and the five numbers are the pixels
  B01010,
  B11111,
  B11111,
  B01110,
  B00100,
  B00000,
  B00000
};

byte smile[8] = {
  B00000,
  B00000,
  B01010,
  B00000,
  B10001,
  B01110,
  B00000,
  B00000
};

byte lock[8] = {
  B01110,
  B10001,
  B10001,
  B11111,
  B11011,
  B11011,
  B11111,
  B00000
};

byte character[8] = {
  B11111,
  B10101,
  B11111,
  B01010,
  B01110,
  B11111,
  B01110,
  B01110
};


LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LC object. Parameters: (rs, enable, d4, d5, d6, d7)

void setup() {
  lcd.begin(16, 2); // Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display
  lcd.createChar(0, heart); // Create a custom character
  lcd.createChar(1, smile);
  lcd.createChar(2, lock);
  lcd.createChar(3, character);

  // Clears the LCD screen
  lcd.clear();

  // Print a message to the LCD
  lcd.print("Custom Character");
}

void loop() {
  lcd.setCursor(1, 1);
  lcd.write(byte(0));  // Display the custom character 0, the heart

  lcd.setCursor(5, 1);
  lcd.write(byte(1));

  lcd.setCursor(9, 1);
  lcd.write(byte(2));

  lcd.setCursor(13, 1);
  lcd.write(byte(3));
}Code language: Arduino (arduino)

lcd.createChar(0, heart); // Create a custom characterCode language: Arduino (arduino)

lcd.write(byte(0));  // Display the custom character 0, or the heartCode language: Arduino (arduino)

Conclusão