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CALVE
CALVE
Associate
Oct 28, 2019 7:49 AM UTC
Solved

Pressure of sensor LPS22HB always equal to 0.0

I use a STEVAL-IDB008V2 and connect sensor LPS22HB to it. By I2C bus , my program communicate with the sensor and it receve interrupt for end of pressure acquisition. The problem is that the pressure read is always equal to 0.0.

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    CALVE
    CALVEBest answer
    Associate
    Oct 31, 2019 7:37 AM UTC

    Thanks. The problem is solved. Yes, as you can see in my program i check the WHO_AM_I code, and it was correct. The STEVAL-IDB008V2 implement another sensor on I2C bus (LPS25HB) with the same device address. Since i modified the address of LPS22HB, it run correctly and i read correct pressure and temperature. Regards.

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    2 replies

    Eleon BORLINI
    Eleon BORLINI
    ST Employee
    Oct 28, 2019 2:09 PM UTC

    Hi @CALVE​ , supposing the I2C communication is well established, did you check if you are receiving the correct WHO_AM_I (0Fh) = B1h? Please check the reference code at this link if you are correctly setting the device (Check device ID, Restore default configuration, Set Output Data Rate) and in which mode you are trying to read data (read data simple, read one shot or multi read fifo). Regards

    CALVE
    CALVEAuthorBest answer
    Associate
    Oct 31, 2019 7:37 AM UTC

    Thanks. The problem is solved. Yes, as you can see in my program i check the WHO_AM_I code, and it was correct. The STEVAL-IDB008V2 implement another sensor on I2C bus (LPS25HB) with the same device address. Since i modified the address of LPS22HB, it run correctly and i read correct pressure and temperature. Regards.

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