Add support for Stiebel Eltron heat pumps

.coveragerc

@@ -557,6 +557,7 @@ omit =
     homeassistant/components/srp_energy/sensor.py
     homeassistant/components/starlingbank/sensor.py
     homeassistant/components/steam_online/sensor.py
+    homeassistant/components/stiebel_eltron/*
     homeassistant/components/stride/notify.py
     homeassistant/components/supervisord/sensor.py
     homeassistant/components/swiss_hydrological_data/sensor.py

CODEOWNERS

@@ -195,6 +195,7 @@ homeassistant/components/spaceapi/* @fabaff
 homeassistant/components/spider/* @peternijssen
 homeassistant/components/sql/* @dgomes
 homeassistant/components/statistics/* @fabaff
+homeassistant/components/stiebel_eltron/* @fucm
 homeassistant/components/sun/* @home-assistant/core
 homeassistant/components/swiss_hydrological_data/* @fabaff
 homeassistant/components/swiss_public_transport/* @fabaff

homeassistant/components/stiebel_eltron/__init__.py

@@ -0,0 +1,59 @@
+"""The component for STIEBEL ELTRON heat pumps with ISGWeb Modbus module."""
+from datetime import timedelta
+import logging
+
+import voluptuous as vol
+
+from homeassistant.components.modbus import (
+    CONF_HUB, DEFAULT_HUB, DOMAIN as MODBUS_DOMAIN)
+from homeassistant.const import CONF_NAME, DEVICE_DEFAULT_NAME
+from homeassistant.helpers import discovery
+import homeassistant.helpers.config_validation as cv
+from homeassistant.util import Throttle
+
+DOMAIN = 'stiebel_eltron'
+
+CONFIG_SCHEMA = vol.Schema({
+    DOMAIN: vol.Schema({
+        vol.Optional(CONF_NAME, default=DEVICE_DEFAULT_NAME): cv.string,
+        vol.Optional(CONF_HUB, default=DEFAULT_HUB): cv.string,
+    })
+}, extra=vol.ALLOW_EXTRA)
+
+_LOGGER = logging.getLogger(__name__)
+
+MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=30)
+
+
+def setup(hass, config):
+    """Set up the STIEBEL ELTRON unit.
+
+    Will automatically load climate platform.
+    """
+    name = config[DOMAIN][CONF_NAME]
+    modbus_client = hass.data[MODBUS_DOMAIN][config[DOMAIN][CONF_HUB]]
+
+    hass.data[DOMAIN] = {
+        'name': name,
+        'ste_data': StiebelEltronData(name, modbus_client)
+    }
+
+    discovery.load_platform(hass, 'climate', DOMAIN, {}, config)
+    return True
+
+
+class StiebelEltronData:
+    """Get the latest data and update the states."""
+
+    def __init__(self, name, modbus_client):
+        """Init the STIEBEL ELTRON data object."""
+        from pystiebeleltron import pystiebeleltron
+        self.api = pystiebeleltron.StiebelEltronAPI(modbus_client, 1)
+
+    @Throttle(MIN_TIME_BETWEEN_UPDATES)
+    def update(self):
+        """Update unit data."""
+        if not self.api.update():
+            _LOGGER.warning("Modbus read failed")
+        else:
+            _LOGGER.debug("Data updated successfully")

homeassistant/components/stiebel_eltron/climate.py

@@ -0,0 +1,149 @@
+"""Support for stiebel_eltron climate platform."""
+import logging
+
+from homeassistant.components.climate import ClimateDevice
+from homeassistant.components.climate.const import (
+    STATE_AUTO, STATE_ECO, STATE_MANUAL, SUPPORT_OPERATION_MODE,
+    SUPPORT_TARGET_TEMPERATURE)
+from homeassistant.const import (
+    ATTR_TEMPERATURE, STATE_OFF, STATE_ON, TEMP_CELSIUS)
+
+from . import DOMAIN as STE_DOMAIN
+
+DEPENDENCIES = ['stiebel_eltron']
+
+_LOGGER = logging.getLogger(__name__)
+
+
+SUPPORT_FLAGS = SUPPORT_TARGET_TEMPERATURE | SUPPORT_OPERATION_MODE
+OPERATION_MODES = [STATE_AUTO, STATE_MANUAL, STATE_ECO, STATE_OFF]
+
+# Mapping STIEBEL ELTRON states to homeassistant states.
+STE_TO_HA_STATE = {'AUTOMATIC': STATE_AUTO,
+                   'MANUAL MODE': STATE_MANUAL,
+                   'STANDBY': STATE_ECO,
+                   'DAY MODE': STATE_ON,
+                   'SETBACK MODE': STATE_ON,
+                   'DHW': STATE_OFF,
+                   'EMERGENCY OPERATION': STATE_ON}
+
+# Mapping homeassistant states to STIEBEL ELTRON states.
+HA_TO_STE_STATE = {value: key for key, value in STE_TO_HA_STATE.items()}
+
+
+def setup_platform(hass, config, add_entities, discovery_info=None):
+    """Set up the StiebelEltron platform."""
+    name = hass.data[STE_DOMAIN]['name']
+    ste_data = hass.data[STE_DOMAIN]['ste_data']
+
+    add_entities([StiebelEltron(name, ste_data)], True)
+
+
+class StiebelEltron(ClimateDevice):
+    """Representation of a STIEBEL ELTRON heat pump."""
+
+    def __init__(self, name, ste_data):
+        """Initialize the unit."""
+        self._name = name
+        self._target_temperature = None
+        self._current_temperature = None
+        self._current_humidity = None
+        self._operation_modes = OPERATION_MODES
+        self._current_operation = None
+        self._filter_alarm = None
+        self._force_update = False
+        self._ste_data = ste_data
+
+    @property
+    def supported_features(self):
+        """Return the list of supported features."""
+        return SUPPORT_FLAGS
+
+    def update(self):
+        """Update unit attributes."""
+        self._ste_data.update(no_throttle=self._force_update)
+        self._force_update = False
+
+        self._target_temperature = self._ste_data.api.get_target_temp()
+        self._current_temperature = self._ste_data.api.get_current_temp()
+        self._current_humidity = self._ste_data.api.get_current_humidity()
+        self._filter_alarm = self._ste_data.api.get_filter_alarm_status()
+        self._current_operation = self._ste_data.api.get_operation()
+
+        _LOGGER.debug("Update %s, current temp: %s", self._name,
+                      self._current_temperature)
+
+    @property
+    def device_state_attributes(self):
+        """Return device specific state attributes."""
+        return {
+            'filter_alarm': self._filter_alarm
+        }
+
+    @property
+    def name(self):
+        """Return the name of the climate device."""
+        return self._name
+
+    # Handle SUPPORT_TARGET_TEMPERATURE
+    @property
+    def temperature_unit(self):
+        """Return the unit of measurement."""
+        return TEMP_CELSIUS
+
+    @property
+    def current_temperature(self):
+        """Return the current temperature."""
+        return self._current_temperature
+
+    @property
+    def target_temperature(self):
+        """Return the temperature we try to reach."""
+        return self._target_temperature
+
+    @property
+    def target_temperature_step(self):
+        """Return the supported step of target temperature."""
+        return 0.1
+
+    @property
+    def min_temp(self):
+        """Return the minimum temperature."""
+        return 10.0
+
+    @property
+    def max_temp(self):
+        """Return the maximum temperature."""
+        return 30.0
+
+    def set_temperature(self, **kwargs):
+        """Set new target temperature."""
+        target_temperature = kwargs.get(ATTR_TEMPERATURE)
+        if target_temperature is not None:
+            _LOGGER.debug("set_temperature: %s", target_temperature)
+            self._ste_data.api.set_target_temp(target_temperature)
+            self._force_update = True
+
+    @property
+    def current_humidity(self):
+        """Return the current humidity."""
+        return float("{0:.1f}".format(self._current_humidity))
+
+    # Handle SUPPORT_OPERATION_MODE
+    @property
+    def operation_list(self):
+        """List of the operation modes."""
+        return self._operation_modes
+
+    @property
+    def current_operation(self):
+        """Return current operation ie. heat, cool, idle."""
+        return STE_TO_HA_STATE.get(self._current_operation)
+
+    def set_operation_mode(self, operation_mode):
+        """Set new operation mode."""
+        new_mode = HA_TO_STE_STATE.get(operation_mode)
+        _LOGGER.debug("set_operation_mode: %s -> %s", self._current_operation,
+                      new_mode)
+        self._ste_data.api.set_operation(new_mode)
+        self._force_update = True

homeassistant/components/stiebel_eltron/manifest.json

@@ -0,0 +1,14 @@
+{
+  "domain": "stiebel_eltron",
+  "name": "STIEBEL ELTRON",
+  "documentation": "https://www.home-assistant.io/components/stiebel_eltron",
+  "requirements": [
+    "pystiebeleltron==0.0.1.dev2"
+  ],
+  "dependencies": [
+    "modbus"
+  ],
+  "codeowners": [
+    "@fucm"
+  ]
+}

requirements_all.txt

@@ -1278,6 +1278,9 @@ pysonos==0.0.9
 # homeassistant.components.spc
 pyspcwebgw==0.4.0
 
+# homeassistant.components.stiebel_eltron
+pystiebeleltron==0.0.1.dev2
+
 # homeassistant.components.stride
 pystride==0.1.7