Configuration for a T6963C doesn't write anything on the screen.

[M4gico]

Hello,
I want to use the LCD display ERM24064-1 with the datasheet below :
ERM24064-1_Series_Datasheet.pdf

To communicate with, I use an ESP32 and PlatformIO on VS Code.
When I upload the code below, nothing happened on the screen. The first time, I don't use the good pins in the constructor and a white line was printed during one second and after nothing, blank screen. So, I think I'm wrong with pins I give to the constructor but I don't find the good path...

The code :

Table for pin connections between T6963c LCD and ESP32:
_______________________________________________________________
T6963c LCD PIN   |    LCD PIN NAME  |        ESP32             |
_______________________________________________________________|
       1         |         GND      |       GND                |
       2         |         GND      |       GND                |
       3         |         VCC      |       +5V                |
       4         |          VO      |      10K RES             |
       5         |          WR      |        17                |
       6         |          RD      |        18                |
       7         |       CE/CS      |        14                |
       8         |         C/D      |        15                |
      10         |         RST      |        16                |
      11         |         DB0      |         2                |
      12         |         DB1      |        19                |
      13         |         DB2      |         4                |
      14         |         DB3      |        21                |
      15         |         DB4      |        27                |
      16         |         DB5      |        26                |
      17         |         DB6      |        25                |
      18         |         DB7      |        33                |
      19         |          FS      |       GND                |
      20         |        VOUT      |       None               |
      21         |       LED A      |       5V                 |
      22         |       LED K      |       GND                |
_______________________________________________________________|

*/

#include <Arduino.h>
//More optimize for ESP32 than U8glib
#include <U8g2lib.h>

#define LED_PIN 12

//_F to put all draw in the RAM
U8G2_T6963_240X64_F_8080 u8g2(U8G2_R1, 2, 19, 4, 21, 27, 26, 25, 33, 17, 14, 15, 16);

void setup() {
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);

  u8g2.begin();
}

void loop() {
  digitalWrite(LED_PIN, !digitalRead(LED_PIN));

  u8g2.firstPage();
  do {
    u8g2.setFont(u8g2_font_04b_03_tr);
    u8g2.drawStr(5, 20, "Hello world!");
  }while(u8g2.nextPage());
  delay(1000);
}

[olikraus]

Nice connection diagram. I didn't fully checked everything, but let's start with the v0 input.
You mentioned VOUT to be not connected. However the correct way is this:
Connect a varpot with 10K between VOUT and GND and connect the wiper of the varpot to V0.
By changing the varpot you should be able to make all pixel visible and invisible.