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ENG-CANSAT-PICO-BMP280 (voir la source)
Version du 26 février 2022 à 23:49
, 26 février 2022 à 23:49→The athmospheric pressure is not correct!
<syntaxhighlight lang="python">
<syntaxhighlight lang="python">
# Read Local pressure
# Calculate corresponding SLP pressure
# (SLP: sea level pressure)
#
from machine import I2C
# BME280 aslo work for BMP280
from bme280 import BME280, BMP280_I2CADDR
from time import sleep
i2c = I2C(1)
# Sensor altitude (in meter) required to
# calculate SLP (See Level Pressure)
altitude = 120.1
bmp = BME280( i2c=i2c, address=BMP280_I2CADDR )
while True:
# returns a tuple with (temperature, pressure_hPa, humidity)
p = bmp.raw_values[1]
p_sea = p + (altitude/8.3)
print( "Plocal: %6.1f hPa, Psea: %6.1f hPa" % (p,p_sea) )
sleep(1)
</syntaxhighlight>
</syntaxhighlight>
which returns:
<nowiki>Plocal: 1017.4 hPa, Psea: 1031.8 hPa
Plocal: 1017.4 hPa, Psea: 1031.9 hPa
Plocal: 1017.3 hPa, Psea: 1031.8 hPa
Plocal: 1017.4 hPa, Psea: 1031.8 hPa
Plocal: 1017.4 hPa, Psea: 1031.9 hPa
Plocal: 1017.4 hPa, Psea: 1031.9 hPa
Plocal: 1017.4 hPa, Psea: 1031.8 hPa</nowiki>
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