Adafruit_SSD1306 128x32 OLED display on custom pins

Adafruit_SSD1306.ino

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

#define SCREEN_WIDTH 128     // OLED display width, in pixels
#define SCREEN_HEIGHT 32     // OLED display height, in pixels
#define OLED_RESET -1        // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C  ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
#define OLED_SDA D6
#define OLED_SCL D7

Adafruit_SSD1306 display(128, 32, &Wire, OLED_RESET);

void setup() {
  Wire.begin(OLED_SDA, OLED_SCL); // pass SDA and SCL pins here
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;)
      ;  // Don't proceed, loop forever
  }
}