arduino_nano_esp32_oled.md

Arduino Nano ESP32 to an Waveshare OLED 1.5" 128x128 Module

• Arduino Nano ESP32
• OLED Display Module
• Libraries used:
  • Adafruit_GFX
  • Adafruit_SSD1351

The sketch is not by me, it's reduced to a minimum and to document for myself how I connected the display 😅

oled.ino

/*************************************************** 
  This is a example sketch demonstrating graphic drawing
  capabilities of the SSD1351 library for the 1.5" 
  and 1.27" 16-bit Color OLEDs with SSD1351 driver chip

  Pick one up today in the adafruit shop!
  ------> http://www.adafruit.com/products/1431
  ------> http://www.adafruit.com/products/1673
 
  If you're using a 1.27" OLED, change SCREEN_HEIGHT to 96 instead of 128.

  These displays use SPI to communicate, 4 or 5 pins are required to  
  interface
  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution

  The Adafruit GFX Graphics core library is also required
  https://github.com/adafruit/Adafruit-GFX-Library
  Be sure to install it!
 ****************************************************/

// Screen dimensions
#define SCREEN_WIDTH  128
#define SCREEN_HEIGHT 128 // Change this to 96 for 1.27" OLED.

// You can use any (4 or) 5 pins 
#define SCLK_PIN 2
#define MOSI_PIN 3
#define DC_PIN   4
#define CS_PIN   5
#define RST_PIN  6

// Color definitions
#define	BLACK           0x0000
#define	BLUE            0x001F
#define	RED             0xF800
#define	GREEN           0x07E0
#define CYAN            0x07FF
#define MAGENTA         0xF81F
#define YELLOW          0xFFE0  
#define WHITE           0xFFFF

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1351.h>
#include <SPI.h>

// Option 1: use any pins but a little slower
Adafruit_SSD1351 tft = Adafruit_SSD1351(SCREEN_WIDTH, SCREEN_HEIGHT, CS_PIN, DC_PIN, MOSI_PIN, SCLK_PIN, RST_PIN);  

// Option 2: must use the hardware SPI pins 
// (for UNO thats sclk = 13 and sid = 11) and pin 10 must be 
// an output. This is much faster - also required if you want
// to use the microSD card (see the image drawing example)
//Adafruit_SSD1351 tft = Adafruit_SSD1351(SCREEN_WIDTH, SCREEN_HEIGHT, &SPI, CS_PIN, DC_PIN, RST_PIN);

float p = 3.1415926;

void setup(void) {
  Serial.begin(9600);
  tft.begin();

  // 0 = no rotation, 1 = 90 degrees clockwise, 2 = degrees 180, 3 = 270 degrees
  // tft.setRotation(1);

  tft.fillScreen(BLACK);

  testTriangles();
  delay(1000);

  // tft print function!
  tftPrintTest();
  delay(1000);
}

void loop() {
}

void testDrawText(char *text, uint16_t color) {
  tft.setCursor(0,0);
  tft.setTextColor(color);
  tft.print(text);
}

void testTriangles() {
  tft.fillScreen(BLACK);
  int color = 0xF800;
  int t;
  int w = tft.width()/2;
  int x = tft.height();
  int y = 0;
  int z = tft.width();
  for(t = 0 ; t <= 15; t+=1) {
    tft.drawTriangle(w, y, y, x, z, x, color);
    x-=4;
    y+=4;
    z-=4;
    color+=100;
  }
}

void tftPrintTest() {
  tft.setCursor(0, 5);
  tft.fillScreen(BLACK);
  tft.setTextColor(WHITE);
  tft.setTextSize(0);
  tft.println("Hello World!");
  tft.setTextSize(1);
  tft.setTextColor(GREEN);
  tft.print(p, 6);
  tft.println(" Want pi?");
  tft.println(" ");
  tft.print(8675309, HEX); // print 8,675,309 out in HEX!
  tft.println(" Print HEX!");
  tft.println(" ");
  tft.setTextColor(WHITE);
  tft.println("Sketch has been");
  tft.println("running for: ");
  tft.setTextColor(MAGENTA);
  tft.print(millis() / 1000);
  tft.setTextColor(WHITE);
  tft.print(" seconds.");
}