U8G2 with Two SSD1306 OLED Displays

Other Hardware Displays
14

Thanks Oliver and Borland for your help and all memebers who have contributed to this forum. Finally, the two SPI OLED displays worked with a little tweaking to the code discussed in this thread. Below is the minimalistic code in case someone requires it:

/*
   U8G2 TWO OLED SPI DISPLAY (MINIMALISTIC)
   HARDWARE: ARDUINO UNO, SSD1306 SPI (7PIN) MODULES
   Updated on 11/22/17
   ARDUINO OLED INTERFACE:
   1st OLED
   13 - D0
   11 - D1
   10 - CS
   9 - DC
   8 - RES
   2nd OLED
   13 - D0
   11 - D1
   7 - CS
   6 - DC
   5 - RES

   The Random number generator is merely to differentiate the two displays and ensure that they are working in HW mode.
   PIN-13 and PIN-11 are common for both OLED modules. No seperate power lines are necessary.
*/

#include <Arduino.h>
#include <U8g2lib.h>

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif
long randNumber1;
long randNumber2;

U8G2_SSD1306_128X64_NONAME_F_4W_HW_SPI OLED1(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);
U8G2_SSD1306_128X64_NONAME_F_4W_HW_SPI OLED2(U8G2_R0, /* cs=*/ 7, /* dc=*/ 6, /* reset=*/ 5);
void setup() {
  OLED1.begin();
  OLED2.begin();
  // put your setup code here, to run once:

}
void draw(void) {

  OLED1.setFont(u8g_font_unifont);
  OLED1.drawStr( 0, 22, "DISPLAY 1");
  OLED1.setFont(u8g2_font_7x14B_mr);
  OLED1.setCursor(1, 40);
  OLED1.print(randNumber1);
}
void draw2(void) {
  OLED2.setFont(u8g_font_unifont);
  OLED2.drawStr( 0, 22, "DISPLAY 2");
  OLED2.setFont(u8g2_font_7x14B_mr);
  OLED2.setCursor(1, 40);
  OLED2.print(randNumber2);
}
void loop(void) {
  // put your main code here, to run repeatedly:

  randNumber1 = random(0, 255);
  randNumber2 = random(0, 255);
  
  OLED1.firstPage();
  do {
    draw();
  } while ( OLED1.nextPage() );
  OLED2.firstPage();
  do {
    draw2();
  } while ( OLED2.nextPage() );
  delay(100);
}

Thanks again!