Esp32 doesnt work with ssd1331 Oled

[waleeds]

Bonjour!
I'm a beginner in using the ESP32 WROOM-32D and I'm trying to run a simple code on it with the OLED ssd1331. it's the test code from the Adafruit_ssd1331 library. I connected the two using this configuration:

#define SCLK 23
#define MOSI 22
#define DC   15
#define CS   4
#define RST  13

The only things I'm sure of is that the OLED works because i just used it with my Arduino mega 2560 and that the ESP32 too because i just used it with my dht22.

What am I missing ? Thanks !

[Idahowalker]

@waleeds

#define SCLK 23
#define MOSI 22
#define DC   15
#define CS   4
#define RST  13

CS should be 5 or 15 for the Arduino Core.

post a image of the oled wired in.

I'd not use 13 for RST if your having issues. GPIO_NUM_13 is the TCK pin and can be used during programing and boot by the ESP32.

Is the oled a 3V3?

[waleeds]

Here.
And yes, it's a 3v3 because when i tried it on the arduino mega i used the 3v3 supply.
Btw i just changed CS to 5 and RST to 19 but i still doesn't work.

[Idahowalker]

@waleeds

used the 3v3 supply.

Does the Mega put out 3V3 on its GPIO pins or 5V?

[waleeds]

both, but i used the 3V3 for sure.

[TomGeorge]

Hi, @waleeds
Welcome to the forum.

@waleeds

it's the test code from the Adafruit_ssd1331 library.

Is the library compatible with the ESP32?

You may need Adafruit's GFX library.

Please post your code.

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Thanks.. Tom..

[waleeds]

yes it is, as all of the tutorials in youtube used this library !

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1331.h>
#include <SPI.h>


// You can use any (4 or) 5 pins
#define sclk 23
#define mosi 22
#define cs   15
#define rst  5
#define dc   19

// 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

// Option 1: use any pins but a little slower
//Adafruit_SSD1331 display = Adafruit_SSD1331(cs, dc, mosi, sclk, rst);

// 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_SSD1331 display = Adafruit_SSD1331(&SPI, cs, dc, rst);

float p = 3.1415926;

void setup(void) {
  Serial.begin(9600);
  Serial.print("hello!");
  display.begin();

  Serial.println("init");
  uint16_t time = millis();
  display.fillScreen(BLACK);
  time = millis() - time;

  Serial.println(time, DEC);
  delay(500);

  lcdTestPattern();
  delay(1000);

  display.fillScreen(BLACK);
  display.setCursor(0,0);
  display.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa");
  delay(1000);

  // tft print function!
  tftPrintTest();
  delay(2000);

  //a single pixel
  display.drawPixel(display.width()/2, display.height()/2, GREEN);
  delay(500);

  // line draw test
  testlines(YELLOW);
  delay(500);

  // optimized lines
  testfastlines(RED, BLUE);
  delay(500);

  testdrawrects(GREEN);
  delay(1000);

  testfillrects(YELLOW, MAGENTA);
  delay(1000);

  display.fillScreen(BLACK);
  testfillcircles(10, BLUE);
  testdrawcircles(10, WHITE);
  delay(1000);

  testroundrects();
  delay(500);

  testtriangles();
  delay(500);

  Serial.println("done");
  delay(1000);
}

void loop() {
}

void testlines(uint16_t color) {
   display.fillScreen(BLACK);
   for (int16_t x=0; x < display.width()-1; x+=6) {
     display.drawLine(0, 0, x, display.height()-1, color);
   }
   for (int16_t y=0; y < display.height()-1; y+=6) {
     display.drawLine(0, 0, display.width()-1, y, color);
   }

   display.fillScreen(BLACK);
   for (int16_t x=0; x < display.width()-1; x+=6) {
     display.drawLine(display.width()-1, 0, x, display.height()-1, color);
   }
   for (int16_t y=0; y < display.height()-1; y+=6) {
     display.drawLine(display.width()-1, 0, 0, y, color);
   }

   // To avoid ESP8266 watchdog timer resets when not using the hardware SPI pins
   delay(0);

   display.fillScreen(BLACK);
   for (int16_t x=0; x < display.width()-1; x+=6) {
     display.drawLine(0, display.height()-1, x, 0, color);
   }
   for (int16_t y=0; y < display.height()-1; y+=6) {
     display.drawLine(0, display.height()-1, display.width()-1, y, color);
   }

   display.fillScreen(BLACK);
   for (int16_t x=0; x < display.width()-1; x+=6) {
     display.drawLine(display.width()-1, display.height()-1, x, 0, color);
   }
   for (int16_t y=0; y < display.height()-1; y+=6) {
     display.drawLine(display.width()-1, display.height()-1, 0, y, color);
   }

}

void testdrawtext(char *text, uint16_t color) {
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0,0);

  for (uint8_t i=0; i < 168; i++) {
    if (i == '\n') continue;
    display.write(i);
    if ((i > 0) && (i % 21 == 0))
      display.println();
  }
}

void testfastlines(uint16_t color1, uint16_t color2) {
   display.fillScreen(BLACK);
   for (int16_t y=0; y < display.height()-1; y+=5) {
     display.drawFastHLine(0, y, display.width()-1, color1);
   }
   for (int16_t x=0; x < display.width()-1; x+=5) {
     display.drawFastVLine(x, 0, display.height()-1, color2);
   }
}

void testdrawrects(uint16_t color) {
 display.fillScreen(BLACK);
 for (int16_t x=0; x < display.height()-1; x+=6) {
   display.drawRect((display.width()-1)/2 -x/2, (display.height()-1)/2 -x/2 , x, x, color);
 }
}

void testfillrects(uint16_t color1, uint16_t color2) {
 display.fillScreen(BLACK);
 for (int16_t x=display.height()-1; x > 6; x-=6) {
   display.fillRect((display.width()-1)/2 -x/2, (display.height()-1)/2 -x/2 , x, x, color1);
   display.drawRect((display.width()-1)/2 -x/2, (display.height()-1)/2 -x/2 , x, x, color2);
 }
}

void testfillcircles(uint8_t radius, uint16_t color) {
  for (uint8_t x=radius; x < display.width()-1; x+=radius*2) {
    for (uint8_t y=radius; y < display.height()-1; y+=radius*2) {
      display.fillCircle(x, y, radius, color);
    }
  }
}

void testdrawcircles(uint8_t radius, uint16_t color) {
  for (int16_t x=0; x < display.width()-1+radius; x+=radius*2) {
    for (int16_t y=0; y < display.height()-1+radius; y+=radius*2) {
      display.drawCircle(x, y, radius, color);
    }
  }
}

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

void testroundrects() {
  display.fillScreen(BLACK);
  int color = 100;
  int i;
  int t;
  for(t = 0 ; t <= 4; t+=1) {
    int x = 0;
    int y = 0;
    int w = display.width();
    int h = display.height();
    for(i = 0 ; i <= 8; i+=1) {
      display.drawRoundRect(x, y, w, h, 5, color);
      x+=2;
      y+=3;
      w-=4;
      h-=6;
      color+=1100;
    }
    color+=100;
  }
}

void tftPrintTest() {
  display.fillScreen(BLACK);
  display.setCursor(0, 5);
  display.setTextColor(RED);
  display.setTextSize(1);
  display.println("Hello World!");
  display.setTextColor(YELLOW, GREEN);
  display.setTextSize(2);
  display.print("Hello Wo");
  display.setTextColor(BLUE);
  display.setTextSize(3);
  display.print(1234.567);
  delay(1500);
  display.setCursor(0, 5);
  display.fillScreen(BLACK);
  display.setTextColor(WHITE);
  display.setTextSize(0);
  display.println("Hello World!");
  display.setTextSize(1);
  display.setTextColor(GREEN);
  display.print(p, 5);
  display.println(" Want pi?");
  display.print(8675309, HEX); // print 8,675,309 out in HEX!
  display.print(" Print HEX");
  display.setTextColor(WHITE);
  display.println("Sketch has been");
  display.println("running for: ");
  display.setTextColor(MAGENTA);
  display.print(millis() / 1000);
  display.setTextColor(WHITE);
  display.print(" seconds.");
}

void mediabuttons() {
 // play
  display.fillScreen(BLACK);
  display.fillRoundRect(25, 10, 78, 60, 8, WHITE);
  display.fillTriangle(42, 20, 42, 60, 90, 40, RED);
  delay(500);
  // pause
  display.fillRoundRect(25, 90, 78, 60, 8, WHITE);
  display.fillRoundRect(39, 98, 20, 45, 5, GREEN);
  display.fillRoundRect(69, 98, 20, 45, 5, GREEN);
  delay(500);
  // play color
  display.fillTriangle(42, 20, 42, 60, 90, 40, BLUE);
  delay(50);
  // pause color
  display.fillRoundRect(39, 98, 20, 45, 5, RED);
  display.fillRoundRect(69, 98, 20, 45, 5, RED);
  // play color
  display.fillTriangle(42, 20, 42, 60, 90, 40, GREEN);
}

/**************************************************************************/
/*!
    @brief  Renders a simple test pattern on the LCD
*/
/**************************************************************************/
void lcdTestPattern(void)
{
  uint8_t w,h;
  display.setAddrWindow(0, 0, 96, 64);

  for (h = 0; h < 64; h++) {
    for (w = 0; w < 96; w++) {
      if (w > 83) {
        display.writePixel(w, h, WHITE);
      } else if (w > 71) {
        display.writePixel(w, h, BLUE);
      } else if (w > 59) {
        display.writePixel(w, h, GREEN);
      } else if (w > 47) {
        display.writePixel(w, h, CYAN);
      } else if (w > 35) {
        display.writePixel(w, h, RED);
      } else if (w > 23) {
        display.writePixel(w, h, MAGENTA);
      } else if (w > 11) {
        display.writePixel(w, h, YELLOW);
      } else {
        display.writePixel(w, h, BLACK);
      }
    }
  }
  display.endWrite();
}

[dlloyd]

@waleeds

I'm trying to run a simple code on it with the OLED ssd1331

Correct me if I'm wrong, but isn't that an ssd1306?
There's a library for that.

[TomGeorge]

@waleeds

yes it is, as all of the tutorials in youtube used this library !

Can you please post link(s) to the Youtube tutorial(s).

Did your display come with a protective plastic screen on it?
If so, what colour was the pull tab?

Thanks.. Tom..

[waleeds]

yes it is ! and like i said it worked on arduino mega!

[waleeds]

yes! here are two links:
first one
second one, the code is in the description.
and yes there was a protective plastic screen on it ! red or orange i believe.