Need for BMP388 sensor data confirmation

[Phil]

Dear,

for a BMP388 sensor we get following readings:

P_raw: 8116928

T_raw: 10024192

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reg_calib_data->par_t1:   27455

reg_calib_data->par_t2:   18744

reg_calib_data->par_t3   -10

reg_calib_data->par_p1: 202

reg_calib_data->par_p2:  -2414

reg_calib_data->par_p3:  35

reg_calib_data->par_p4:   0

reg_calib_data->par_p5:   25214

reg_calib_data->par_p6:   30181

reg_calib_data->par_p7:   -13

reg_calib_data->par_p8:   -10

reg_calib_data->par_p9:   17093

reg_calib_data->par_p10:   19

reg_calib_data->par_p11:  -60

-------------------------------------------------------

Now there is some questioning about the correct solution for   compr_press  &  comp_temp.

One solution is:

- comp_press:   919.993000 hPa

- comp_temp:   51.97 °C

A second solution is:

- comp_press:   895.486273 hPa

- comp_temp:   51.976446 °C

Would you please be so kind to indicate the correct solution?

Thank you.

[FAE_CA1 · Accepted solution]

Hi,

Thanks for your inquiry.

According to the attached "sample_bmp388_calculation1.xlsx", your second solution is correct. Please use the latest BMP388 API at https://github.com/BoschSensortec/BMP3-Sensor-API to check if you can get the same results.

Thanks.

[Phil]

Thank you indeed.

[Phil]

One more hint.

After intense error searching it seems that a version issue might be a reason for the discrepancy.

- V1.1.3 was used to:

  --> record the raw pressure and raw temperature data

  --> calculate the compensated values   (919.993hPa, solution one of the given example)

 --> write both raw and comensated values into a data file

V2.0.5 was used to

--> read the data file

--> check the plausibility of the raw data  ( 895.486 hPa, solution two of the given example)

Please confirm if solution one is still valid, if the API version V1.1.3 is used.

If the API version v1.1.3 MUST NOT BE USED AT ALL for any reason, please explain in detail.

Thank you very much.