diff --git a/homeassistant/components/arduino/__init__.py b/homeassistant/components/arduino/__init__.py
index c890e8a8b1e..e87a625522e 100644
--- a/homeassistant/components/arduino/__init__.py
+++ b/homeassistant/components/arduino/__init__.py
@@ -26,7 +26,6 @@ def setup(hass, config):
 
     port = config[DOMAIN][CONF_PORT]
 
-    board = None
     try:
         board = ArduinoBoard(port)
     except (serial.serialutil.SerialException, FileNotFoundError):
diff --git a/homeassistant/components/arduino/sensor.py b/homeassistant/components/arduino/sensor.py
index 935aa01a9a7..9178e99e0f9 100644
--- a/homeassistant/components/arduino/sensor.py
+++ b/homeassistant/components/arduino/sensor.py
@@ -26,10 +26,6 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     """Set up the Arduino platform."""
     board = hass.data[DOMAIN]
 
-    if board is None:
-        _LOGGER.error("A connection has not been made to the Arduino board")
-        return False
-
     pins = config.get(CONF_PINS)
 
     sensors = []
diff --git a/homeassistant/components/arduino/switch.py b/homeassistant/components/arduino/switch.py
index 9ea7a8b7a43..7ce4de69f4f 100644
--- a/homeassistant/components/arduino/switch.py
+++ b/homeassistant/components/arduino/switch.py
@@ -33,11 +33,6 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     """Set up the Arduino platform."""
     board = hass.data[DOMAIN]
 
-    # Verify that Arduino board is present
-    if board is None:
-        _LOGGER.error("A connection has not been made to the Arduino board")
-        return False
-
     pins = config.get(CONF_PINS)
 
     switches = []
diff --git a/homeassistant/components/bloomsky/__init__.py b/homeassistant/components/bloomsky/__init__.py
index c9948aa2ff9..ba10c5c7413 100644
--- a/homeassistant/components/bloomsky/__init__.py
+++ b/homeassistant/components/bloomsky/__init__.py
@@ -30,7 +30,6 @@ def setup(hass, config):
     """Set up the BloomSky component."""
     api_key = config[DOMAIN][CONF_API_KEY]
 
-    bloomsky = None
     try:
         bloomsky = BloomSky(api_key, hass.config.units.is_metric)
     except RuntimeError:
diff --git a/homeassistant/components/sleepiq/__init__.py b/homeassistant/components/sleepiq/__init__.py
index 9227b872080..3fc065264ca 100644
--- a/homeassistant/components/sleepiq/__init__.py
+++ b/homeassistant/components/sleepiq/__init__.py
@@ -36,8 +36,6 @@ def setup(hass, config):
     Will automatically load sensor components to support
     devices discovered on the account.
     """
-    data = None
-
     username = config[DOMAIN][CONF_USERNAME]
     password = config[DOMAIN][CONF_PASSWORD]
     client = Sleepyq(username, password)
diff --git a/homeassistant/components/sleepiq/binary_sensor.py b/homeassistant/components/sleepiq/binary_sensor.py
index 2e502859601..3ba39a38764 100644
--- a/homeassistant/components/sleepiq/binary_sensor.py
+++ b/homeassistant/components/sleepiq/binary_sensor.py
@@ -26,10 +26,9 @@ class IsInBedBinarySensor(SleepIQSensor, BinarySensorDevice):
 
     def __init__(self, sleepiq_data, bed_id, side):
         """Initialize the sensor."""
-        SleepIQSensor.__init__(self, sleepiq_data, bed_id, side)
-        self.type = IS_IN_BED
+        super().__init__(sleepiq_data, bed_id, side)
         self._state = None
-        self._name = SENSOR_TYPES[self.type]
+        self._name = SENSOR_TYPES[IS_IN_BED]
         self.update()
 
     @property
@@ -44,5 +43,5 @@ class IsInBedBinarySensor(SleepIQSensor, BinarySensorDevice):
 
     def update(self):
         """Get the latest data from SleepIQ and updates the states."""
-        SleepIQSensor.update(self)
+        super().update()
         self._state = self.side.is_in_bed