Adafruit Oled library causing my esp8266 to crash!

Projects Programming
1

Hello,

today I wanted to try to use a oled display with esp8266 using arduino language. Before I always used micropython to use an oled display. I had written a long code but it kept showing error. Then I decided to comment out the code that I used for the oled display. Then the error disappeared. Can someone please help me solve that problem?
My Code:

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>

//netwok
const char* ssid = "Iffaiman";
const char* password = "iffaiman313";
//oled var
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Serial.begin(115200);
  delay(1000);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to WiFi");
  display.println("Hello, world!");
  display.display();
}

void loop() {
}```
The error message:
```--------------- CUT HERE FOR EXCEPTION DECODER ---------------

Exception (28):
epc1=0x40201e0a epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

Kind Regards

1 Like
2

Does the error occur when you compile the sketch or when you run it ?

Is the sketch that you posted the one that errors or not ? Please post the full error message, using code tags when you do

3

The error comes when I run it. That is the code which causes error.

4 


--------------- CUT HERE FOR EXCEPTION DECODER ---------------

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3424, room 16 
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8 
tail 0
chksum 0x2b
csum 0x2b
v00049960
~ld
5

The code that you posted does not even compile as the WiFi library is not #included, so it could not have produced that error message.

Are you sure that you posted the correct sketch ?

6

Oh my mistake. but i figured out the solution now

7

For the benefit of others please shar details of the problem and solution

8

The problem was that I forget to initialize the display(if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) { Serial.println(F("SSD1306 allocation failed")); for (;;); }). that caused some error that always crashed my program. I found my mistake with the help of an tutorial, that showed how to use an oled display.

9

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