STEVAL-MK141V2 (HTS221) temp/RH sensor

[Take4az]

Hi, I got the reference board of STEVAL-MKI141V2 that has HTS221 temperature and humidity sensor.

#1

I read out the calibration registers by the manual of https://www.st.com/resource/en/technical_note/tn1218-interpreting-humidity-and-temperature-readings-in-the-hts221-digital-humidity-sensor-stmicroelectronics.pdf and the result is following.

    H0_rH_X2 (30) = 3A,   H1_rH_x2 (31) = 87,  T0_degC_x8 (32) = A7,  T1_degC_x8 (33) = 16

    T2/T0 msb (35) = 4

    H0_T0_OUT (36,37) = FFFB,   H1_T0_OUT (3A,3B) = D6E4

    T0_OUT (3C, 3D) = FFFF,    T1_OUT (3E, 3F) = 0310

 So the registers value of H0_T0_OUT, H1_T0_OUT also T0_OUT value are minus, is that normal?

#2

It seems the temperature and humidity can be calucuated from there registers. 25.5 degree and 57% RH

but humidity is more 10% higher than other sensors. The accuracy is out of specification value +/- 3.5%. 

#3

I want to check the device that using HTS221 sensor, Could you let me know brand and model name if someone knows any products those using HTS221?

Thank you for reading

[Federica Bossi]

Hi @Take4az ,

Welcome to ST Community!

Have a look at this board Adafruit.

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