Como Ligar as Coisas

SSD1306 OLED Display – Display OLED com I2C – Como ligar?

Escrito por: ­ 19 de set de 2017 ­ 3.477 views

Neste artigo veremos:

O que você vai precisar

1 Display OLED de qualquer resolução (usamos o 128×64) com I2C – caso o seu seja outro modifique o arquivo de acordo
Biblioteca Adafruit_SSD1306 que poderá ser encontrada aqui
Fios (jumpers)

A Conexão

A conexão com os módulos I2C ocorre de maneira muito simples.
Vcc – 5v do Arduino
Gnd – Gns do Arduino
SDA (Dados) – na maioria dos Arduinos (A4), no Mega (20), no Leonardo (D2)
SCK (Clock) – na maioria dos Arduinos (A5), no Mega (21), no Leonardo (D3)

A programação

Scanner

Para saber qual é o seu display I2C use o programa abaixo.

// from https://playground.arduino.cc/Main/I2cScanner?action=sourceblock&num=1
#include <Wire.h>

void setup()
{
  Wire.begin();
  Serial.begin(9600);
  while (!Serial); 
  Serial.println("\nI2C Scanner");
}

void loop()
{
  byte error, address;
  int nDevices;
  Serial.println("Scaneando...");
  nDevices = 0;
  for(address = 1; address < 127; address++ ) 
  {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0)
    {
      Serial.print("Dispositivo I2C encontrado no endereço 0x");
      if (address<16) 
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");

      nDevices++;
    }
    else if (error==4) 
    {
      Serial.print("Erro desconhecido no endereço 0x");
      if (address<16) 
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("Não encontramos nenhum dispositivo I2C\n");
  else
    Serial.println("pronto\n");
  delay(5000); 
}

Programa

Para mostrar uma imagem

// Este exemplo foi criado por Edson Sidnei Sobreira 
// Domínio Público

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

const unsigned char HackEduca_logo [] PROGMEM = {
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};
void setup()   {                
  display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
  display.clearDisplay();
  display.drawBitmap(0, 0, HackEduca_logo, 128, 64, 1);
  
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(2,5);
  display.println("Acesse nosso Website!");

  display.setCursor(5,55);
  display.print("www.hackeduca.com.br");
  display.display();

}

void loop() {
  
}

Mixly

print
Creative Commons License
This work by Edson Sobreira is licensed under a Creative Commons Attribution 4.0 International
19 de set de 2017 por
Sem comentários

Idealizador e colaborador do Hackeduca. É um entusiasta de tecnologias e programação. Desde criança, vivia desmontando as coisas, só pra ver o que tinha dentro (hoje pelo menos, espera a garantia acabar) - ;o) Foi apresentado ao Arduino e Scratch em 2009 e desde então, descobriu um mundo de coisas bacanas.

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