diff --git a/.coveragerc b/.coveragerc
index eaeee0f992d..24ceeae65be 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -563,7 +563,6 @@ omit =
     homeassistant/components/map/*
     homeassistant/components/mastodon/notify.py
     homeassistant/components/matrix/*
-    homeassistant/components/maxcube/*
     homeassistant/components/mcp23017/*
     homeassistant/components/media_extractor/*
     homeassistant/components/mediaroom/media_player.py
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 6437f30ddaf..a8ceff28333 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -472,6 +472,9 @@ logi_circle==0.2.2
 # homeassistant.components.luftdaten
 luftdaten==0.6.4
 
+# homeassistant.components.maxcube
+maxcube-api==0.4.1
+
 # homeassistant.components.mythicbeastsdns
 mbddns==0.1.2
 
diff --git a/tests/components/maxcube/conftest.py b/tests/components/maxcube/conftest.py
new file mode 100644
index 00000000000..7f45634b986
--- /dev/null
+++ b/tests/components/maxcube/conftest.py
@@ -0,0 +1,110 @@
+"""Tests for EQ3 Max! component."""
+from unittest.mock import create_autospec, patch
+
+from maxcube.device import MAX_DEVICE_MODE_AUTOMATIC, MAX_DEVICE_MODE_MANUAL
+from maxcube.room import MaxRoom
+from maxcube.thermostat import MaxThermostat
+from maxcube.wallthermostat import MaxWallThermostat
+from maxcube.windowshutter import MaxWindowShutter
+import pytest
+
+from homeassistant.components.maxcube import DOMAIN
+from homeassistant.setup import async_setup_component
+
+
+@pytest.fixture
+def room():
+    """Create a test MAX! room."""
+    r = MaxRoom()
+    r.id = 1
+    r.name = "TestRoom"
+    return r
+
+
+@pytest.fixture
+def thermostat():
+    """Create test MAX! thermostat."""
+    t = create_autospec(MaxThermostat)
+    t.name = "TestThermostat"
+    t.serial = "AABBCCDD01"
+    t.rf_address = "abc1"
+    t.room_id = 1
+    t.is_thermostat.return_value = True
+    t.is_wallthermostat.return_value = False
+    t.is_windowshutter.return_value = False
+    t.mode = MAX_DEVICE_MODE_AUTOMATIC
+    t.comfort_temperature = 19.0
+    t.eco_temperature = 14.0
+    t.target_temperature = 20.5
+    t.actual_temperature = 19.0
+    t.max_temperature = None
+    t.min_temperature = None
+    t.valve_position = 25  # 25%
+    return t
+
+
+@pytest.fixture
+def wallthermostat():
+    """Create test MAX! wall thermostat."""
+    t = create_autospec(MaxWallThermostat)
+    t.name = "TestWallThermostat"
+    t.serial = "AABBCCDD02"
+    t.rf_address = "abc2"
+    t.room_id = 1
+    t.is_thermostat.return_value = False
+    t.is_wallthermostat.return_value = True
+    t.is_windowshutter.return_value = False
+    t.mode = MAX_DEVICE_MODE_MANUAL
+    t.comfort_temperature = 19.0
+    t.eco_temperature = 14.0
+    t.target_temperature = 4.5
+    t.actual_temperature = 19.0
+    t.max_temperature = 29.0
+    t.min_temperature = 4.5
+    return t
+
+
+@pytest.fixture
+def windowshutter():
+    """Create test MAX! window shutter."""
+    shutter = create_autospec(MaxWindowShutter)
+    shutter.name = "TestShutter"
+    shutter.serial = "AABBCCDD03"
+    shutter.rf_address = "abc3"
+    shutter.room_id = 1
+    shutter.is_open = True
+    shutter.is_thermostat.return_value = False
+    shutter.is_wallthermostat.return_value = False
+    shutter.is_windowshutter.return_value = True
+    return shutter
+
+
+@pytest.fixture
+def hass_config():
+    """Return test HASS configuration."""
+    return {
+        DOMAIN: {
+            "gateways": [
+                {
+                    "host": "1.2.3.4",
+                }
+            ]
+        }
+    }
+
+
+@pytest.fixture
+async def cube(hass, hass_config, room, thermostat, wallthermostat, windowshutter):
+    """Build and setup a cube mock with a single room and some devices."""
+    with patch("homeassistant.components.maxcube.MaxCube") as mock:
+        cube = mock.return_value
+        cube.rooms = [room]
+        cube.devices = [thermostat, wallthermostat, windowshutter]
+        cube.room_by_id.return_value = room
+        cube.devices_by_room.return_value = [thermostat, wallthermostat, windowshutter]
+        cube.device_by_rf.side_effect = {d.rf_address: d for d in cube.devices}.get
+        assert await async_setup_component(hass, DOMAIN, hass_config)
+        await hass.async_block_till_done()
+        gateway = hass_config[DOMAIN]["gateways"][0]
+        mock.assert_called_with(gateway["host"], gateway.get("port", 62910))
+        return cube
diff --git a/tests/components/maxcube/test_maxcube_binary_sensor.py b/tests/components/maxcube/test_maxcube_binary_sensor.py
new file mode 100644
index 00000000000..df448284e80
--- /dev/null
+++ b/tests/components/maxcube/test_maxcube_binary_sensor.py
@@ -0,0 +1,37 @@
+"""Test EQ3 Max! Window Shutters."""
+from datetime import timedelta
+
+from maxcube.cube import MaxCube
+from maxcube.windowshutter import MaxWindowShutter
+
+from homeassistant.components.binary_sensor import DEVICE_CLASS_WINDOW
+from homeassistant.const import (
+    ATTR_DEVICE_CLASS,
+    ATTR_FRIENDLY_NAME,
+    STATE_OFF,
+    STATE_ON,
+)
+from homeassistant.util import utcnow
+
+from tests.common import async_fire_time_changed
+
+ENTITY_ID = "binary_sensor.testroom_testshutter"
+
+
+async def test_window_shuttler(hass, cube: MaxCube, windowshutter: MaxWindowShutter):
+    """Test a successful setup with a shuttler device."""
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state is not None
+    assert state.state == STATE_ON
+    assert state.attributes.get(ATTR_FRIENDLY_NAME) == "TestRoom TestShutter"
+    assert state.attributes.get(ATTR_DEVICE_CLASS) == DEVICE_CLASS_WINDOW
+
+    windowshutter.is_open = False
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == STATE_OFF
diff --git a/tests/components/maxcube/test_maxcube_climate.py b/tests/components/maxcube/test_maxcube_climate.py
new file mode 100644
index 00000000000..e700763769c
--- /dev/null
+++ b/tests/components/maxcube/test_maxcube_climate.py
@@ -0,0 +1,364 @@
+"""Test EQ3 Max! Thermostats."""
+from datetime import timedelta
+
+from maxcube.cube import MaxCube
+from maxcube.device import (
+    MAX_DEVICE_MODE_AUTOMATIC,
+    MAX_DEVICE_MODE_BOOST,
+    MAX_DEVICE_MODE_MANUAL,
+    MAX_DEVICE_MODE_VACATION,
+)
+from maxcube.thermostat import MaxThermostat
+from maxcube.wallthermostat import MaxWallThermostat
+
+from homeassistant.components.climate.const import (
+    ATTR_CURRENT_TEMPERATURE,
+    ATTR_HVAC_ACTION,
+    ATTR_HVAC_MODE,
+    ATTR_HVAC_MODES,
+    ATTR_MAX_TEMP,
+    ATTR_MIN_TEMP,
+    ATTR_PRESET_MODE,
+    ATTR_PRESET_MODES,
+    CURRENT_HVAC_HEAT,
+    CURRENT_HVAC_IDLE,
+    CURRENT_HVAC_OFF,
+    DOMAIN as CLIMATE_DOMAIN,
+    HVAC_MODE_AUTO,
+    HVAC_MODE_HEAT,
+    HVAC_MODE_OFF,
+    PRESET_AWAY,
+    PRESET_BOOST,
+    PRESET_COMFORT,
+    PRESET_ECO,
+    PRESET_NONE,
+    SERVICE_SET_HVAC_MODE,
+    SERVICE_SET_PRESET_MODE,
+    SERVICE_SET_TEMPERATURE,
+)
+from homeassistant.components.maxcube.climate import (
+    MAX_TEMPERATURE,
+    MIN_TEMPERATURE,
+    OFF_TEMPERATURE,
+    ON_TEMPERATURE,
+    PRESET_ON,
+    SUPPORT_FLAGS,
+)
+from homeassistant.const import (
+    ATTR_ENTITY_ID,
+    ATTR_FRIENDLY_NAME,
+    ATTR_SUPPORTED_FEATURES,
+    ATTR_TEMPERATURE,
+)
+from homeassistant.util import utcnow
+
+from tests.common import async_fire_time_changed
+
+ENTITY_ID = "climate.testroom_testthermostat"
+WALL_ENTITY_ID = "climate.testroom_testwallthermostat"
+VALVE_POSITION = "valve_position"
+
+
+async def test_setup_thermostat(hass, cube: MaxCube):
+    """Test a successful setup of a thermostat device."""
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_AUTO
+    assert state.attributes.get(ATTR_FRIENDLY_NAME) == "TestRoom TestThermostat"
+    assert state.attributes.get(ATTR_HVAC_ACTION) == CURRENT_HVAC_HEAT
+    assert state.attributes.get(ATTR_HVAC_MODES) == [
+        HVAC_MODE_OFF,
+        HVAC_MODE_AUTO,
+        HVAC_MODE_HEAT,
+    ]
+    assert state.attributes.get(ATTR_PRESET_MODES) == [
+        PRESET_NONE,
+        PRESET_BOOST,
+        PRESET_COMFORT,
+        PRESET_ECO,
+        PRESET_AWAY,
+        PRESET_ON,
+    ]
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_NONE
+    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == SUPPORT_FLAGS
+    assert state.attributes.get(ATTR_MAX_TEMP) == MAX_TEMPERATURE
+    assert state.attributes.get(ATTR_MIN_TEMP) == 5.0
+    assert state.attributes.get(ATTR_CURRENT_TEMPERATURE) == 19.0
+    assert state.attributes.get(ATTR_TEMPERATURE) == 20.5
+    assert state.attributes.get(VALVE_POSITION) == 25
+
+
+async def test_setup_wallthermostat(hass, cube: MaxCube):
+    """Test a successful setup of a wall thermostat device."""
+    state = hass.states.get(WALL_ENTITY_ID)
+    assert state.state == HVAC_MODE_OFF
+    assert state.attributes.get(ATTR_FRIENDLY_NAME) == "TestRoom TestWallThermostat"
+    assert state.attributes.get(ATTR_HVAC_ACTION) == CURRENT_HVAC_HEAT
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_NONE
+    assert state.attributes.get(ATTR_MAX_TEMP) == 29.0
+    assert state.attributes.get(ATTR_MIN_TEMP) == 5.0
+    assert state.attributes.get(ATTR_CURRENT_TEMPERATURE) == 19.0
+    assert state.attributes.get(ATTR_TEMPERATURE) is None
+
+
+async def test_thermostat_set_hvac_mode_off(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Turn off thermostat."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_HVAC_MODE: HVAC_MODE_OFF},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, OFF_TEMPERATURE, MAX_DEVICE_MODE_MANUAL
+    )
+
+    thermostat.mode = MAX_DEVICE_MODE_MANUAL
+    thermostat.target_temperature = OFF_TEMPERATURE
+    thermostat.valve_position = 0
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_OFF
+    assert state.attributes.get(ATTR_TEMPERATURE) is None
+    assert state.attributes.get(ATTR_HVAC_ACTION) == CURRENT_HVAC_OFF
+    assert state.attributes.get(VALVE_POSITION) == 0
+
+    wall_state = hass.states.get(WALL_ENTITY_ID)
+    assert wall_state.attributes.get(ATTR_HVAC_ACTION) == CURRENT_HVAC_OFF
+
+
+async def test_thermostat_set_hvac_mode_heat(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set hvac mode to heat."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_HVAC_MODE: HVAC_MODE_HEAT},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, 20.5, MAX_DEVICE_MODE_MANUAL
+    )
+    thermostat.mode = MAX_DEVICE_MODE_MANUAL
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+
+
+async def test_thermostat_set_temperature(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set hvac mode to heat."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_TEMPERATURE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_TEMPERATURE: 10.0},
+        blocking=True,
+    )
+    cube.set_target_temperature.assert_called_once_with(thermostat, 10.0)
+    thermostat.target_temperature = 10.0
+    thermostat.valve_position = 0
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_AUTO
+    assert state.attributes.get(ATTR_TEMPERATURE) == 10.0
+    assert state.attributes.get(ATTR_HVAC_ACTION) == CURRENT_HVAC_IDLE
+
+
+async def test_thermostat_set_preset_on(hass, cube: MaxCube, thermostat: MaxThermostat):
+    """Set preset mode to on."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_ON},
+        blocking=True,
+    )
+
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, ON_TEMPERATURE, MAX_DEVICE_MODE_MANUAL
+    )
+    thermostat.mode = MAX_DEVICE_MODE_MANUAL
+    thermostat.target_temperature = ON_TEMPERATURE
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+    assert state.attributes.get(ATTR_TEMPERATURE) is None
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_ON
+
+
+async def test_thermostat_set_preset_comfort(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set preset mode to comfort."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_COMFORT},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, thermostat.comfort_temperature, MAX_DEVICE_MODE_MANUAL
+    )
+    thermostat.mode = MAX_DEVICE_MODE_MANUAL
+    thermostat.target_temperature = thermostat.comfort_temperature
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+    assert state.attributes.get(ATTR_TEMPERATURE) == thermostat.comfort_temperature
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_COMFORT
+
+
+async def test_thermostat_set_preset_eco(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set preset mode to eco."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_ECO},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, thermostat.eco_temperature, MAX_DEVICE_MODE_MANUAL
+    )
+    thermostat.mode = MAX_DEVICE_MODE_MANUAL
+    thermostat.target_temperature = thermostat.eco_temperature
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+    assert state.attributes.get(ATTR_TEMPERATURE) == thermostat.eco_temperature
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_ECO
+
+
+async def test_thermostat_set_preset_away(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set preset mode to away."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_AWAY},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, None, MAX_DEVICE_MODE_VACATION
+    )
+    thermostat.mode = MAX_DEVICE_MODE_VACATION
+    thermostat.target_temperature = thermostat.eco_temperature
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+    assert state.attributes.get(ATTR_TEMPERATURE) == thermostat.eco_temperature
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_AWAY
+
+
+async def test_thermostat_set_preset_boost(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set preset mode to boost."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_BOOST},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, None, MAX_DEVICE_MODE_BOOST
+    )
+    thermostat.mode = MAX_DEVICE_MODE_BOOST
+    thermostat.target_temperature = thermostat.eco_temperature
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(ENTITY_ID)
+    assert state.state == HVAC_MODE_AUTO
+    assert state.attributes.get(ATTR_TEMPERATURE) == thermostat.eco_temperature
+    assert state.attributes.get(ATTR_PRESET_MODE) == PRESET_BOOST
+
+
+async def test_thermostat_set_preset_none(
+    hass, cube: MaxCube, thermostat: MaxThermostat
+):
+    """Set preset mode to boost."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_PRESET_MODE,
+        {ATTR_ENTITY_ID: ENTITY_ID, ATTR_PRESET_MODE: PRESET_NONE},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        thermostat, None, MAX_DEVICE_MODE_AUTOMATIC
+    )
+
+
+async def test_wallthermostat_set_hvac_mode_heat(
+    hass, cube: MaxCube, wallthermostat: MaxWallThermostat
+):
+    """Set wall thermostat hvac mode to heat."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: WALL_ENTITY_ID, ATTR_HVAC_MODE: HVAC_MODE_HEAT},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        wallthermostat, MIN_TEMPERATURE, MAX_DEVICE_MODE_MANUAL
+    )
+    wallthermostat.target_temperature = MIN_TEMPERATURE
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(WALL_ENTITY_ID)
+    assert state.state == HVAC_MODE_HEAT
+    assert state.attributes.get(ATTR_TEMPERATURE) == MIN_TEMPERATURE
+
+
+async def test_wallthermostat_set_hvac_mode_auto(
+    hass, cube: MaxCube, wallthermostat: MaxWallThermostat
+):
+    """Set wall thermostat hvac mode to auto."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: WALL_ENTITY_ID, ATTR_HVAC_MODE: HVAC_MODE_AUTO},
+        blocking=True,
+    )
+    cube.set_temperature_mode.assert_called_once_with(
+        wallthermostat, None, MAX_DEVICE_MODE_AUTOMATIC
+    )
+    wallthermostat.mode = MAX_DEVICE_MODE_AUTOMATIC
+    wallthermostat.target_temperature = 23.0
+
+    async_fire_time_changed(hass, utcnow() + timedelta(minutes=5))
+    await hass.async_block_till_done()
+
+    state = hass.states.get(WALL_ENTITY_ID)
+    assert state.state == HVAC_MODE_AUTO
+    assert state.attributes.get(ATTR_TEMPERATURE) == 23.0