Cómo programar y conectar el Display LCD 20X4 con Arduino Uno
En el siguiente tutorial aprenderás como conectar el Display Oled de 128×64 0.96 a un Arduino Uno y programarlo para mostrar imágenes y textos. Los materiales a utilizar son los siguientes:
¿Display Oled 128×64 SSD1306 como utilizar con Arduino UNO?
Para utilizar el Display Lcd Oled 20×4 con la tarjeta de desarrollo Arduino puedes realizar dos tipos de conexiones, se muestran en las siguientes imágenes:
- 3.3V del Arduino Uno conectar al pin Vcc del Oled
- GND del Arduino UNO conectar al pin GND del Oled
- Pin A4 del Arduino Uno conectar al pin SCL del Oled
- Pin A5 del Arduino Uno conectar al pin SDA del Oled
2- Segunda conexión:
En las dos imágenes se demuestran las conexiones que debes de hacer con tu Arduino Uno y tu Oled, te preguntaras por qué es posible que funcione con estas 2 tipos de conexiones y es porque esos pines están reservados para que realices una comunicación con SCL y SDA. Si es tu caso y no estás usando Arduino Uno solo busca el pinout de la placa que estés empleando e identifica los pines reservados SCL y SDA y ahí conecta tu Display Oled.
Cuando realices las conexiones de tu Arduino Uno y el Oled abre el IDE de Arduino e importa las librerías de Adafruit GFX graphics y Adafruit_SSD1306, ya que incluiste las librerías tienes que realizar un cambio a la librería Adafruit_SSD1306, solo tienes que buscar la carpeta “libraries” de donde se instaló tu arduino, posteriormente buscar la carpeta de “Adafruit_SSD1306-master” y abrir el archivo “Adafruit_SSD1306.h” con cualquier editor de código, te recomendamos Notepad++, busca la línea de código número 29 y coméntala agregando al principio dos // y descomenta la línea 28, borrando las //. Después debes guardar y cerrar el editor de texto. En la siguiente imagen se muestra como hacerlo:
Por ultimo te comparto este código para que lo puedas probar en tu Oled y verificar su funcionamiento:
< Adafruit_GFX.h >
#include < Adafruit_SSD1306.h >
const unsigned char PROGMEM logo [] = {
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};
#define OLED_RESET LED_BUILTIN
Adafruit_SSD1306 display(OLED_RESET);
#if (SSD1306_LCDHEIGHT != 64)
#error(«Altura incorrecta, cambie en la libreria de Adafruit_SSD1306.h!»);
#endif
void read_temp() {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,10);
display.println(«SALUDOS DE»);
display.setCursor(0,32);
display.println(«UNITELECTRONICS»);
display.display();
}
void setup() {
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
display.drawBitmap(0,0,logo,128,64,1);
display.display(); delay(5000);
}
void loop() {
read_temp();
}
Compila el código y cárgalo a tu Arduino Uno.
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