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mpy_bme280_esp8266
kopia lustrzana https://github.com/peterhinch/mpy_bme280_esp8266
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Peter Dahlberg 2016-05-21 23:57:15 +02:00
rodzic 12b768d677
commit dd5b4428b4
1 zmienionych plików z 15 dodań i 12 usunięć
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bme280.py
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@ -50,8 +50,13 @@ BME280_OSAMPLE_16 = 5
BME280_REGISTER_CONTROL_HUM = 0xF2 BME280_REGISTER_CONTROL_HUM = 0xF2
BME280_REGISTER_CONTROL = 0xF4 BME280_REGISTER_CONTROL = 0xF4
class BME280: class BME280:
def __init__(self, mode=BME280_OSAMPLE_1, address=BME280_I2CADDR, i2c=None,
def __init__(self,
mode=BME280_OSAMPLE_1,
address=BME280_I2CADDR,
i2c=None,
**kwargs): **kwargs):
# Check that mode is valid. # Check that mode is valid.
if mode not in [BME280_OSAMPLE_1, BME280_OSAMPLE_2, BME280_OSAMPLE_4, if mode not in [BME280_OSAMPLE_1, BME280_OSAMPLE_2, BME280_OSAMPLE_4,
@ -83,7 +88,6 @@ class BME280:
self.dig_H6 = unpack_from("<b", dig_e1_e7, 6)[0] self.dig_H6 = unpack_from("<b", dig_e1_e7, 6)[0]
self.i2c.writeto_mem(self.address, BME280_REGISTER_CONTROL, self.i2c.writeto_mem(self.address, BME280_REGISTER_CONTROL,
bytearray([0x3F])) bytearray([0x3F]))
self.t_fine = 0 self.t_fine = 0
@ -91,7 +95,7 @@ class BME280:
# temporary data holders which stay allocated # temporary data holders which stay allocated
self._l1_barray = bytearray(1) self._l1_barray = bytearray(1)
self._l8_barray = bytearray(8) self._l8_barray = bytearray(8)
self._l3_resultarray = array("i", [0,0,0]) self._l3_resultarray = array("i", [0, 0, 0])
def read_raw_data(self, result): def read_raw_data(self, result):
""" Reads the raw (uncompensated) data from the sensor. """ Reads the raw (uncompensated) data from the sensor.
@ -145,10 +149,8 @@ class BME280:
raw_temp, raw_press, raw_hum = self._l3_resultarray raw_temp, raw_press, raw_hum = self._l3_resultarray
#temperature #temperature
var1 = ((raw_temp >> 3) - (self.dig_T1 << 1)) * (self.dig_T2 >> 11) var1 = ((raw_temp >> 3) - (self.dig_T1 << 1)) * (self.dig_T2 >> 11)
var2 = (( var2 = (((((raw_temp >> 4) - self.dig_T1) *
(((raw_temp >> 4) - self.dig_T1) * ((raw_temp >> 4) - self.dig_T1)) >> 12) * self.dig_T3) >> 14
((raw_temp >> 4) - self.dig_T1)) >> 12) *
self.dig_T3) >> 14
self.t_fine = var1 + var2 self.t_fine = var1 + var2
temp = (self.t_fine * 5 + 128) >> 8 temp = (self.t_fine * 5 + 128) >> 8
@ -171,10 +173,11 @@ class BME280:
#humidity #humidity
h = self.t_fine - 76800 h = self.t_fine - 76800
h = (((((raw_hum << 14) - (self.dig_H4 << 20) - (self.dig_H5 * h)) + h = (((((raw_hum << 14) - (self.dig_H4 << 20) -
16384) >> 15) * (((((((h * self.dig_H6) >> 10) * (((h * (self.dig_H5 * h)) + 16384)
self.dig_H3) >> 11) + 32768)) >> 10) + 2097152) * >> 15) * (((((((h * self.dig_H6) >> 10) *
self.dig_H2 + 8192) >> 14)) (((h * self.dig_H3) >> 11) + 32768)) >> 10) +
2097152) * self.dig_H2 + 8192) >> 14))
h = h - (((((h >> 15) * (h >> 15)) >> 7) * self.dig_H1) >> 4) h = h - (((((h >> 15) * (h >> 15)) >> 7) * self.dig_H1) >> 4)
h = 0 if h < 0 else h h = 0 if h < 0 else h
h = 419430400 if h > 419430400 else h h = 419430400 if h > 419430400 else h
@ -186,7 +189,7 @@ class BME280:
result[2] = humidity result[2] = humidity
return result return result
return array("i",(temp, pressure, humidity)) return array("i", (temp, pressure, humidity))
@property @property
def values(self): def values(self):