128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
"""
|
|
Support for Modbus switches.
|
|
|
|
For more details about this platform, please refer to the documentation at
|
|
https://home-assistant.io/components/switch.modbus/
|
|
"""
|
|
import logging
|
|
|
|
import homeassistant.components.modbus as modbus
|
|
from homeassistant.helpers.entity import ToggleEntity
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
DEPENDENCIES = ['modbus']
|
|
|
|
|
|
def setup_platform(hass, config, add_devices, discovery_info=None):
|
|
"""Read configuration and create Modbus devices."""
|
|
switches = []
|
|
slave = config.get("slave", None)
|
|
if modbus.TYPE == "serial" and not slave:
|
|
_LOGGER.error("No slave number provided for serial Modbus")
|
|
return False
|
|
registers = config.get("registers")
|
|
if registers:
|
|
for regnum, register in registers.items():
|
|
bits = register.get("bits")
|
|
for bitnum, bit in bits.items():
|
|
if bit.get("name"):
|
|
switches.append(ModbusSwitch(bit.get("name"),
|
|
slave,
|
|
regnum,
|
|
bitnum))
|
|
coils = config.get("coils")
|
|
if coils:
|
|
for coilnum, coil in coils.items():
|
|
switches.append(ModbusSwitch(coil.get("name"),
|
|
slave,
|
|
coilnum,
|
|
0,
|
|
coil=True))
|
|
add_devices(switches)
|
|
|
|
|
|
class ModbusSwitch(ToggleEntity):
|
|
"""Representation of a Modbus switch."""
|
|
|
|
# pylint: disable=too-many-arguments
|
|
def __init__(self, name, slave, register, bit, coil=False):
|
|
"""Initialize the switch."""
|
|
self._name = name
|
|
self.slave = int(slave) if slave else 1
|
|
self.register = int(register)
|
|
self.bit = int(bit)
|
|
self._coil = coil
|
|
self._is_on = None
|
|
self.register_value = None
|
|
|
|
def __str__(self):
|
|
"""String representation of Modbus switch."""
|
|
return "%s: %s" % (self.name, self.state)
|
|
|
|
@property
|
|
def should_poll(self):
|
|
"""Poling needed.
|
|
|
|
Slaves are not allowed to initiate communication on Modbus networks.
|
|
"""
|
|
return True
|
|
|
|
@property
|
|
def unique_id(self):
|
|
"""Return a unique ID."""
|
|
return "MODBUS-SWITCH-{}-{}-{}".format(self.slave,
|
|
self.register,
|
|
self.bit)
|
|
|
|
@property
|
|
def is_on(self):
|
|
"""Return true if switch is on."""
|
|
return self._is_on
|
|
|
|
@property
|
|
def name(self):
|
|
"""Return the name of the switch."""
|
|
return self._name
|
|
|
|
def turn_on(self, **kwargs):
|
|
"""Set switch on."""
|
|
if self.register_value is None:
|
|
self.update()
|
|
|
|
if self._coil:
|
|
modbus.NETWORK.write_coil(self.register, True)
|
|
else:
|
|
val = self.register_value | (0x0001 << self.bit)
|
|
modbus.NETWORK.write_register(unit=self.slave,
|
|
address=self.register,
|
|
value=val)
|
|
|
|
def turn_off(self, **kwargs):
|
|
"""Set switch off."""
|
|
if self.register_value is None:
|
|
self.update()
|
|
|
|
if self._coil:
|
|
modbus.NETWORK.write_coil(self.register, False)
|
|
else:
|
|
val = self.register_value & ~(0x0001 << self.bit)
|
|
modbus.NETWORK.write_register(unit=self.slave,
|
|
address=self.register,
|
|
value=val)
|
|
|
|
def update(self):
|
|
"""Update the state of the switch."""
|
|
if self._coil:
|
|
result = modbus.NETWORK.read_coils(self.register, 1)
|
|
self.register_value = result.bits[0]
|
|
self._is_on = self.register_value
|
|
else:
|
|
result = modbus.NETWORK.read_holding_registers(
|
|
unit=self.slave, address=self.register,
|
|
count=1)
|
|
val = 0
|
|
for i, res in enumerate(result.registers):
|
|
val += res * (2**(i*16))
|
|
self.register_value = val
|
|
self._is_on = (val & (0x0001 << self.bit) > 0)
|