I2S send

static inline void ADC_Sampling(){
  uint16_t i2s_read_buff[NUM_SAMPLES];
  int num = i2s_read_bytes(I2S_NUM_0, (char*)i2s_read_buff,  NUM_SAMPLES * sizeof(uint16_t), portMAX_DELAY);
  //collected_samples += num / sizeof(uint16_t);
  if(Chart_is_ok_to_Send_Data && olvasunk_e){
    for (int i=0;i<NUM_SAMPLES;i++) {
      String json = "";
      json += String((i2s_read_buff[i] & 0xFFF)/ (float)40.95);
      json += "}";
      webSocket.broadcastTXT(json.c_str(), json.length());
    }

  }
}