def __init__(self, pin):
self.__ds = OneWire(pin)
self.__data = 0
class FakeDallasTemperature():
def __init__(self, pin):
self.__ds = OneWire(pin)
self.__data = 0
def __fetchAddress(self):
ds_address = self.__ds.search()
if ds_address == "1":
return False
self.__ds.reset()
self.__ds.select(ds_address)
self.__ds.write(0x44, 1)
Arduino.delay(700)
present = self.__ds.reset()
self.__ds.select(ds_address)
self.__ds.write(0xBE)
return True
def __fetchData(self):
data = []
for i in range(9):
val = self.__ds.read()
data.append(val)
raw = (data[1] << 8) | data[0]
type = 1
if type == 0:
raw = raw << 3;
if data[7] == 0x10:
raw = (raw & 0xFFF0) + 12 - data[6]
else:
cfg = (data[4] & 0x60)
if cfg == 0x00:
raw = raw << 3
elif cfg == 0x20:
raw = raw << 2
elif cfg == 0x40:
raw = raw << 1
else:
pass
self.__data = raw
def getCelsius(self):
if self.__fetchAddress():
self.__fetchData()
return self.__data / 16.0
def getFahrenheit(self):
if self.__fetchAddress():
self.__fetchData()
return self.getCelsius() * 1.8 + 32.0
def readonewire(self):
for key in self.unit['onewire']:
data = []
one = OneWire(self.unit['onewire'][key]['pin'])
one.reset()
one.select(self.unit['onewire'][key]['addr'])
one.write(0x44, 1)
sleep(float(750) / 1000)
one.reset()
one.select(self.unit['onewire'][key]['addr'])
one.write(0xBE)
for i in range(9):
val = one.read()
data.append(val)
raw = (data[1] << 8) | data[0]
cfg = (data[4] & 0x60)
if cfg == 0x00:
raw = raw << 3
elif cfg == 0x20:
raw = raw << 2
elif cfg == 0x40:
raw = raw << 1
if raw < 2048:
temp = (raw / 16.0)
else:
temp = -((~raw & 0xffff) >> 2) / 16.0
time = datetime.now().strftime('%H:%M:%S')
self.unit['onewire'][key].update(temp=(temp))
self.unit['onewire'][key].update(lastupdate=str(time))
del one
