Hello,
I want to have an accurate relative altitude so I bought the Grove - Barometer (High-Accuracy) Sensor with the HP206C high-accuracy. But I am disappointed about the values are read.
I am using the example program that display the temperature, pressure and altitude each 1 second. I expected to see closed values between 2 acquisitions because of the high accuracy of the sensor (0.01m) but I see large variation. For instance, you can see several times in the serial log below a change in altitude of about 2 meters whereas the sensor does not move.
I tried to configure the sensor using HP20X_CONVERT_OSR4096 instead of HP20X_CONVERT_OSR1024 and changed OSR_ConvertTime to 150ms. I do not see a difference.
Could you give some tips about how read accurate values?
****HP20x_dev demo by seeed studio****
Calculation formula: H = [8.5(101325-P)]/100
****HP20x_dev demo by seeed studio****
Calculation formula: H = [8.5(101325-P)]/100
------------------
Temper:
20.08C.
Filter:
14.70C.
Pressure:
888.47hPa.
Filter:
545.01hPa
Altitude:
1095.89m.
Filter:
547.95m.
------------------
------------------
Temper:
20.08C.
Filter:
16.75C.
Pressure:
888.26hPa.
Filter:
797.68hPa
Altitude:
1097.83m.
Filter:
840.24m.
------------------
------------------
Temper:
20.09C.
Filter:
18.81C.
Pressure:
888.21hPa.
Filter:
848.71hPa
Altitude:
1098.30m.
Filter:
1004.95m.
------------------
------------------
Temper:
20.09C.
Filter:
19.57C.
Pressure:
888.26hPa.
Filter:
876.63hPa
Altitude:
1097.83m.
Filter:
1061.35m.
------------------
------------------
Temper:
20.09C.
Filter:
19.99C.
Pressure:
888.48hPa.
Filter:
883.73hPa
Altitude:
1095.80m.
Filter:
1083.13m.
------------------
------------------
Temper:
20.08C.
Filter:
20.04C.
Pressure:
888.26hPa.
Filter:
886.35hPa
Altitude:
1097.83m.
Filter:
1092.42m.
------------------
------------------
Temper:
20.08C.
Filter:
20.07C.
Pressure:
888.26hPa.
Filter:
887.81hPa
Altitude:
1097.83m.
Filter:
1096.13m.
------------------
------------------
Temper:
20.09C.
Filter:
20.08C.
Pressure:
888.35hPa.
Filter:
888.13hPa
Altitude:
1097.00m.
Filter:
1096.64m.
------------------
------------------
Temper:
20.09C.
Filter:
20.09C.
Pressure:
888.31hPa.
Filter:
888.24hPa
Altitude:
1097.37m.
Filter:
1097.09m.
------------------
------------------
Temper:
20.09C.
Filter:
20.09C.
Pressure:
888.09hPa.
Filter:
888.15hPa
Altitude:
1099.41m.
Filter:
1098.40m.
------------------