HTS221 Stale Data

Software Arduino
1

I’ve posted this question on the STM32 Arduino forum as well (since I am using their HTS221 API), but it should be equally applicable to post it here. I will not duplicate all content to this post, instead I direct the reader to the original post for more details: https://www.stm32duino.com/viewtopic.php?f=7&t=1593.

The issue I am having is that I cannot seem to get the HTS221 to accept the configuration I send it nor will it send me the correct temp/humidity (it is always the same value for temp and the same value for humidity). I can properly query and receive the device ID (0xBC) and I can query (without error) the current configuration. But after I have changed the configuration, I am still only getting back the original config. Is this possibly a faulty HTS221 chip?

Here is the applicable code:

i2c device_hts;
SensorRing_st ring = {0};   
HTS_Data_st hts_data = {0};
...
// initialize the sensor
ring.error |= HTS_Begin(&device_hts,&hts_data);
// collect data
while(1) {
	ring.error |= HTS_Poll(&device_hts,&hts_data);
	dealy_us(4000); // delay 4msec (I've tried 1 second delays, same result)
}

SensorRing_Error_et HTS_Begin(void *handle, HTS_Data_st *hts_data)
{    
    /* Power down the device */
    if ( HTS_DeActivate( (void *)handle ) == HTS_ERROR )
        return HTS_SENSOR_ERROR;

    /* Enable BDU */
    if ( HTS_Set_BduMode( (void *)handle, HTS_ENABLE ) == HTS_ERROR )
    {
    return HTS_SENSOR_ERROR;
    }
    if (HTS_Set_Odr((void *)handle, HTS_ODR_1HZ) == HTS_ERROR)
    {
        return HTS_SENSOR_ERROR;
    }
    // I also tried just using the Set_InitConfig() method, same result
    // HTS_Init_st hts_init = {0};
    // hts_init.avg_h = HTS_AVGH_4;
    // hts_init.avg_t = HTS_AVGT_2;
    // hts_init.odr = HTS_ODR_1HZ;
    // hts_init.bdu_status = HTS_DISABLE;
    // hts_init.heater_status = HTS_DISABLE;
    // hts_init.irq_level = HTS_HIGH_LVL;
    // hts_init.irq_output_type = HTS_PUSHPULL;
    // hts_init.irq_enable = HTS_DISABLE;
    // HTS_Set_InitConfig((void *)handle,&hts_init);
    
    /* Enable sensor */
    HTS_Activate((void *)handle);
    
    /* Tag sensor */
    HTS_Get_DeviceID((void *)handle,&hts_data->id);

    return ALL_SENSOR_OK;
}

Here is the sample output I receive for temp/humidity:

[17:30:46] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:47] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:48] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:49] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:50] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:51] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:52] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:53] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:54] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0
[17:30:55] Humidity: 61.5, Temp_C: 23.9, Temp_F: 75.02, DevId: 0xbc, Error: 0x0

Here is the configuration I send to HTS221 (top) and what I receive when I query the current configuration (bottom):
hts221_configuraiton_issue-min (1)

Does anyone else have this issue? Or any ideas on troubleshooting steps to resolve the issue. (I’ve tried simply toggling various registers to no avail.)

2

does the devices shows up when you run i2c scan ?

3

My device is connected to a microcontroller, so I cannot use i2c scan. But, I am able to correctly query the device ID (0xBC), so I know it is connected and communicating. I can also see activity on my logic analyzer.

4

Any thoughts on how I can troubleshoot this issue?

5

i have not used this sensor. i will recommends checking with sensor manufacture ST

6

I will contact the manufacturer. However, this is an NCD-developed module with the HTS221 sensor, is there not any support for it?

7

we have Arduino and python sample code for it

8

Understood. I will look at the code and see if I get the same results.