Add geniushub sensor and binary_sensor (#23811)

* Initial commit

* add lastComms and de-lint

* dummy commit

* dummy commit 2

* refactor to temp in favour of battery

* back to battery, and no temp

* use snake_case

* Bump client

* only v3 API exposes device attributes

* delint

* delint2

* Change GeniusSwitch to GensiusBinarySensor

homeassistant/components/geniushub/binary_sensor.py

@@ -0,0 +1,74 @@
+"""Support for Genius Hub binary_sensor devices."""
+from datetime import datetime
+import logging
+
+from homeassistant.components.binary_sensor import BinarySensorDevice
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+
+from . import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+GH_IS_SWITCH = ['Dual Channel Receiver', 'Electric Switch', 'Smart Plug']
+
+
+async def async_setup_platform(hass, config, async_add_entities,
+                               discovery_info=None):
+    """Set up the Genius Hub sensor entities."""
+    client = hass.data[DOMAIN]['client']
+
+    switches = [GeniusBinarySensor(client, d)
+                for d in client.hub.device_objs if d.type[:21] in GH_IS_SWITCH]
+
+    async_add_entities(switches)
+
+
+class GeniusBinarySensor(BinarySensorDevice):
+    """Representation of a Genius Hub binary_sensor."""
+
+    def __init__(self, client, device):
+        """Initialize the binary sensor."""
+        self._client = client
+        self._device = device
+
+        if device.type[:21] == 'Dual Channel Receiver':
+            self._name = 'Dual Channel Receiver {}'.format(device.id)
+        else:
+            self._name = '{} {}'.format(device.type, device.id)
+
+    async def async_added_to_hass(self):
+        """Set up a listener when this entity is added to HA."""
+        async_dispatcher_connect(self.hass, DOMAIN, self._refresh)
+
+    @callback
+    def _refresh(self):
+        self.async_schedule_update_ha_state(force_refresh=True)
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return self._name
+
+    @property
+    def should_poll(self) -> bool:
+        """Return False as the geniushub devices should not be polled."""
+        return False
+
+    @property
+    def is_on(self):
+        """Return the status of the sensor."""
+        return self._device.state['outputOnOff']
+
+    @property
+    def device_state_attributes(self):
+        """Return the device state attributes."""
+        attrs = {}
+        attrs['assigned_zone'] = self._device.assignedZones[0]['name']
+
+        last_comms = self._device._info_raw['childValues']['lastComms']['val']  # noqa; pylint: disable=protected-access
+        if last_comms != 0:
+            attrs['last_comms'] = datetime.utcfromtimestamp(
+                last_comms).isoformat()
+
+        return {**attrs}