Problem connecting oled screen module to Wireless Stick Lite(V3)

#1

I’m trying to connect a oled display module with an encoder and two buttons.
image

the first time i tried the code the encoder and the back button all worked fine, later on the encoder stopped working and the value was only 0 or 1, and all the buttons, except the encoder button always read as pressed.
this is the code:

#include <Arduino.h>
#include <U8g2lib.h>
#include <Wire.h>
#include <ESP32Encoder.h>

#define OLED_SDA 17
#define OLED_SCL 19

#define BTN_BAK  26
#define BTN_CON  14
#define ENC_PSH  21
#define ENC_TRA  18
#define ENC_TRB  20

U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

ESP32Encoder encoder;

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

  Wire.begin(OLED_SDA, OLED_SCL);

  u8g2.begin();
  
  ESP32Encoder::useInternalWeakPullResistors = puType::up;
  encoder.attachHalfQuad(ENC_TRA, ENC_TRB);
  encoder.setCount(0);

  pinMode(BTN_BAK, INPUT_PULLUP);
  pinMode(BTN_CON, INPUT_PULLUP);
  pinMode(ENC_PSH, INPUT_PULLUP);
}

void loop() {
  long posizione = encoder.getCount();
  bool b_bak = digitalRead(BTN_BAK) == LOW;
  bool b_con = digitalRead(BTN_CON) == LOW;
  bool b_psh = digitalRead(ENC_PSH) == LOW;

  u8g2.clearBuffer();                    
  
  u8g2.setFont(u8g2_font_6x12_tr); 
  u8g2.drawStr(0, 10, "DIAGNOSTICA U8G2");
  u8g2.drawHLine(0, 12, 128);

  u8g2.setFont(u8g2_font_7x14_tr);
  
  u8g2.setCursor(0, 30);
  u8g2.print("BACK: "); u8g2.print(b_bak ? "PREMUTO" : "-");
  
  u8g2.setCursor(0, 45);
  u8g2.print("CONF: "); u8g2.print(b_con ? "PREMUTO" : "-");

  // Valore Encoder (Font grande e centrato)
  u8g2.setFont(u8g2_font_helvB14_tr); 
  u8g2.setCursor(0, 64);
  u8g2.print("VAL: ");
  u8g2.print(posizione);
  
  if(b_psh) {
    u8g2.drawDisc(110, 55, 6);
  }

  u8g2.sendBuffer();
  delay(20);
}