Cube_cell board and bmp280

Hi,
I’m trying to read the data from my BMP280 sensor but it doesn’t works

I’m waiting for your help

my code:

#include "Arduino.h"
#include <Wire.h>
#include <BMP280.h>

uint8_t confirmedNbTrials = 4;

float temperature, humidity, pressure, lux, co2, tvoc;
uint16_t baseline;
int count;
int maxtry = 50;

BMP280 bmp;


void setup() {
	Serial.begin(9600);
  Wire.begin();

  pinMode(Vext, OUTPUT);
  digitalWrite(Vext, LOW);
  delay(500);
  count = 0;
  bmp.begin();
  delay(500);
  bmp.setSampling(BMP280::MODE_NORMAL,     /* Operating Mode. */
                  BMP280::SAMPLING_X2,     /* Temp. oversampling */
                  BMP280::SAMPLING_X16,    /* Pressure oversampling */
                  BMP280::FILTER_X16,      /* Filtering. */
                  BMP280::STANDBY_MS_500); /* Standby time. */
  float temp = bmp.readTemperature();
  pressure = (float)bmp.readPressure() / 100.0;
  Wire.end();
  while (pressure > 1190.0 && count < maxtry) {
    bmp.begin();
    delay(500);
    bmp.setSampling(BMP280::MODE_NORMAL,     /* Operating Mode. */
                    BMP280::SAMPLING_X2,     /* Temp. oversampling */
                    BMP280::SAMPLING_X16,    /* Pressure oversampling */
                    BMP280::FILTER_X16,      /* Filtering. */
                    BMP280::STANDBY_MS_500); /* Standby time. */
    pressure = (float)bmp.readPressure() / 100.0;
    Wire.end();
    count++;
    delay(500);
  }
  if (pressure > 1190.0) {
    pressure = 0;
    Serial.println("BMP ERROR");
  }

  Wire.end();
  digitalWrite(Vext, HIGH);
  uint16_t batteryVoltage = getBatteryVoltage();
  unsigned char *puc;


  Serial.print("T=");
  Serial.print(temperature);
  Serial.print("C, RH=");
  Serial.print(humidity);
  Serial.print("%, Lux=");
  Serial.print(lux);
  Serial.print(" lx, Pressure=");
  Serial.print(pressure);
  Serial.print(" hPA, CO2=");
  Serial.print(co2);
  Serial.print(" ppm, TVOC=");
  Serial.print(tvoc);
  Serial.print(" ppb, Baseline: ");
  Serial.print(baseline);
  Serial.print(", BatteryVoltage:");
  Serial.println(batteryVoltage);
}

void loop()
{

}