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    Use BMP388's temperature data

    antoineB
    New Poster

    Use BMP388's temperature data

    Hi,
    I'm using a BMP388 sensor, to read pressure and temperature.

    I'm using python with FTDI cable to access sensor through I²C. I can read/write register successfully but I don't understand how to interpret data.

    Before try the pressure, I'm testing with temperature sensor:

    When reading data register (from 0x07 to 0x09) I'm able to see that this values changes. When reading register 0x31 to 0x35 corresponding to NVM_PAR_T1, NVM_PAR_T2, NVM_PAR_T3, I have respectivly this values: 0xB66B, 0xFD48, 0xF6.
    So I use them with the formulas from the datasheet (PAR_T1=NVM_PAR_T1/(2power(-8)), ...)
    Also use : CombinedRawData = ((Data3<<16) | (Data2<<8) | Data1)
    PartialData1= CombinedRawData -PAR_T1
    PartialData2 = PartialData1*PAR_T2

    temp = PartialData2 + (PartialData1*PartialData1)*PAR_T3

    But "temp" is a weird value around -200.

    What did I miss to exploit the BMP388 temperature data from the data registers ?

    Thanks,

    Antoine

    Tags (1)
    1 REPLY 1
    BSTRobin
    Community Moderator

    Re: Use BMP388's temperature data

    Hi antoineB,

    You could refer BMP3 sensor API from github: https://github.com/BoschSensortec/BMP3-Sensor-API/tree/master/examples/read_sensor_data
    Refer bmp3_get_sensor_data() function to get temperature, pressure value.

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