58 lines
2.3 KiB
Python
58 lines
2.3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# *****************************************************************************
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Markus Zolliker <markus.zolliker@psi.ch>
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# *****************************************************************************
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"""virtual sensor switching between two others depending on range"""
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from frappy.core import ERROR, Attached, BoolType, Parameter, Readable, TupleOf, EnumType, FloatRange
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class Sensor(Readable):
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upper = Attached()
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lower = Attached()
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switch_range = Parameter('switching range', datatype=TupleOf(FloatRange(), FloatRange()), readonly=False, default=(0, 0))
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used_sensor = Parameter('sensor to use', EnumType(lower=0, upper=1), readonly=False, default=0)
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value = Parameter(datatype=FloatRange(unit='K'))
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pollinterval = Parameter(export=False)
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status = Parameter(default=(Readable.Status.ERROR, 'unintialized'))
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def initModule(self):
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super().initModule()
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self.rawsensor.registerCallbacks(self)
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def update_value(self, value):
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src = self.upper if self.used_sensor == 'upper' else self.lower
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try:
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self.value = src.value
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self.status = src.status
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except Exception as e:
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self.status = ERROR, repr(e)
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def update_status(self, value):
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self.update_value(None)
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def read_value(self):
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src = self.upper if self.used_sensor == 'upper' else self.lower
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return src.read_value()
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def read_status(self):
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src = self.upper if self.used_sensor == 'upper' else self.lower
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return src.read_status()
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