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modbus sensor value scaling (#2972)

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This commit is contained in:
Per Sandström 2016-08-27 11:49:49 +02:00 committed by Robbie Trencheny
parent c05d27d214
commit 2c26514c95
1 changed files with 18 additions and 8 deletions
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26
homeassistant/components/sensor/modbus.py
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@ -26,11 +26,15 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
if registers: if registers:
for regnum, register in registers.items(): for regnum, register in registers.items():
if register.get("name"): if register.get("name"):
sensors.append(ModbusSensor(register.get("name"), sensors.append(
slave, ModbusSensor(register.get("name"),
regnum, slave,
None, regnum,
register.get("unit"))) None,
register.get("unit"),
scale=register.get("scale", 1),
offset=register.get("offset", 0),
precision=register.get("precision", 0)))
if register.get("bits"): if register.get("bits"):
bits = register.get("bits") bits = register.get("bits")
for bitnum, bit in bits.items(): for bitnum, bit in bits.items():
@ -53,8 +57,9 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
class ModbusSensor(Entity): class ModbusSensor(Entity):
"""Representation of a Modbus Sensor.""" """Representation of a Modbus Sensor."""
# pylint: disable=too-many-arguments # pylint: disable=too-many-arguments, too-many-instance-attributes
def __init__(self, name, slave, register, bit=None, unit=None, coil=False): def __init__(self, name, slave, register, bit=None, unit=None, coil=False,
scale=1, offset=0, precision=0):
"""Initialize the sensor.""" """Initialize the sensor."""
self._name = name self._name = name
self.slave = int(slave) if slave else 1 self.slave = int(slave) if slave else 1
@ -63,6 +68,9 @@ class ModbusSensor(Entity):
self._value = None self._value = None
self._unit = unit self._unit = unit
self._coil = coil self._coil = coil
self._scale = scale
self._offset = offset
self._precision = precision
def __str__(self): def __str__(self):
"""Return the name and the state of the sensor.""" """Return the name and the state of the sensor."""
@ -118,4 +126,6 @@ class ModbusSensor(Entity):
if self.bit: if self.bit:
self._value = val & (0x0001 << self.bit) self._value = val & (0x0001 << self.bit)
else: else:
self._value = val self._value = format(
self._scale * val + self._offset,
".{}f".format(self._precision))