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"""
Onewire interface using owserver
"""
import os
import ow
class OnewireException(Exception):
pass
ow.init('127.0.0.1:4304')
_sensors = {}
with open(os.path.join(os.path.realpath(os.path.dirname(__file__)), 'onewire-sensors.txt'), 'r') as sensors_file:
for line in sensors_file:
line = line.strip()
address, name = line.split(' ', 1)
_sensors[name] = address
def sensors():
return list(_sensors.keys())
class SensorFacade(object):
def __init__(self, sensor, name):
self._sensor = sensor
self._name = name
def __getattr__(self, name):
return getattr(self._sensor, name)
@property
def temperature(self):
for i in range(1,3):
rv = float(self._sensor.temperature)
if rv > 65:
continue
if rv < -25:
continue
return rv
raise OnewireException("Bus error for %s" % self._name)
def sensor(name):
if name not in _sensors:
raise OnewireException('Don\'t know about sensor %s' % name)
return SensorFacade(ow.Sensor('/%s' % _sensors[name]), name)
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