Problem with communication with HTS221 sensor

Question

Hello Nordic community, 
 
 I have a nrf52-DK with SDK15.2.0 and I'm trying to communicate with ST HTS221 sensor. I have the original STEVAL-MKI141V2 evaluation board. 
 I use the twi_sensor example, provided in the SDK. I added the hts221 driver from the SDK and used the default functions for initialization: 
 
 

#include <stdio.h>
#include "boards.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"


#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#include "hts221.h"

#include "nrf_twi_mngr.h"

/* TWI instance ID. */
#define TWI_INSTANCE_ID 0

#define MAX_PENDING_TRANSACTIONS 33




void sen_init();
void read_th();

NRF_TWI_MNGR_DEF(m_nrf_twi_mngr, MAX_PENDING_TRANSACTIONS, TWI_INSTANCE_ID);

NRF_TWI_SENSOR_DEF(m_nrf_twi_sensor, &m_nrf_twi_mngr, HTS221_MIN_QUEUE_SIZE);

HTS221_INSTANCE_DEF(m_hts221, &m_nrf_twi_sensor, HTS221_BASE_ADDRESS);

////static hts221_data_t m_sample;

//void print_identity(ret_code_t r, void *p_register_data)
//{
// NRF_LOG_INFO("Identity: %d", *((uint8_t *)p_register_data));
//}



void sen_init ()
{
	uint32_t err;
	
 nrf_drv_twi_config_t const config = {
 .scl = 27,
 .sda = 26,
 .frequency = NRF_DRV_TWI_FREQ_100K,
 .interrupt_priority = APP_IRQ_PRIORITY_LOWEST,
 .clear_bus_init = false
 };


 APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
 NRF_LOG_DEFAULT_BACKENDS_INIT();

 NRF_LOG_INFO("TWI sensor example started.");
 NRF_LOG_FLUSH();

 err = nrf_twi_mngr_init(&m_nrf_twi_mngr, &config);
 APP_ERROR_CHECK(err);

 err = nrf_twi_sensor_init(&m_nrf_twi_sensor);
 APP_ERROR_CHECK(err);

 err = hts221_init(&m_hts221);
 APP_ERROR_CHECK(err);
 
 err = hts221_avg_cfg (&m_hts221, HTS221_TEMP_SAMPLES_8, HTS221_HUMIDITY_SAMPLES_16);
 APP_ERROR_CHECK(err);
 
 
	//	err = hts221_data_rate_cfg (&m_hts221, HTS221_ODR_ONESHOT);
	//	APP_ERROR_CHECK(err);
 
 
 uint8_t reg;
 
 err = hts221_who_am_i_read (&m_hts221, NULL, &reg);
 APP_ERROR_CHECK(err);
 
 NRF_LOG_INFO("WHO AM I: %d ", reg);
 NRF_LOG_FLUSH();
}


void read_th()
{
 uint32_t err;
 int16_t temperature = 0;
 int16_t humidity = 0;
 int16_t rawtemp;
 int16_t rawhum;

 
 err = hts221_temp_read(&m_hts221, NULL ,&rawtemp);
 APP_ERROR_CHECK(err);
	NRF_LOG_INFO("RAW TEMP : %d
", rawtemp);
 
 temperature = hts221_temp_process(&m_hts221, rawtemp) /8;

 
 err = hts221_hum_read(&m_hts221, NULL , &rawhum);
 APP_ERROR_CHECK(err);
	NRF_LOG_INFO("RAW HUMIDITY : %d
", rawhum);
	
 humidity = hts221_hum_process(&m_hts221, rawhum) /2;

	
 NRF_LOG_INFO("Temp: %d || Humidity: %d
", temperature, humidity);
}


/**
 * @brief Function for main application entry.
 */
int main(void)
{	
 
 sen_init();
 


 NRF_LOG_INFO("Here.");
 NRF_LOG_FLUSH();
 //APP_ERROR_CHECK(err);

 while(1)
 {
 
 nrf_delay_ms(500);
 
 //	read_th();
 
 //NRF_LOG_FLUSH();
 }
 }

/** @} */

When I try to read the whoami register, I get value 0. When I try to read the temperature and humidity data, always get the same value. 
 I tried to communicate with ST LIS2DH12 accelerometer the same way with the same example and everything is normal. Is it possible the problem to be in the hts221 libraries?