[binary_sensor.arest] Fix name for sensor and shorten logger messages (#5460)

* Fix name for sensor and shorten logger messages

* Use variable as name if none is given

homeassistant/components/binary_sensor/arest.py

@@ -30,7 +30,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Setup the aREST binary sensor."""
+    """Set up the aREST binary sensor."""
     resource = config.get(CONF_RESOURCE)
     pin = config.get(CONF_PIN)
     sensor_class = config.get(CONF_SENSOR_CLASS)
@@ -38,13 +38,11 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
     try:
         response = requests.get(resource, timeout=10).json()
     except requests.exceptions.MissingSchema:
-        _LOGGER.error('Missing resource or schema in configuration. '
-                      'Add http:// to your URL.')
+        _LOGGER.error("Missing resource or schema in configuration. "
+                      "Add http:// to your URL")
         return False
     except requests.exceptions.ConnectionError:
-        _LOGGER.error('No route to device at %s. '
-                      'Please check the IP address in the configuration file.',
-                      resource)
+        _LOGGER.error("No route to device at %s", resource)
         return False
 
     arest = ArestData(resource, pin)
@@ -67,10 +65,10 @@ class ArestBinarySensor(BinarySensorDevice):
         self.update()
 
         if self._pin is not None:
-            request = requests.get('{}/mode/{}/i'.format
-                                   (self._resource, self._pin), timeout=10)
+            request = requests.get(
+                '{}/mode/{}/i'.format(self._resource, self._pin), timeout=10)
             if request.status_code is not 200:
-                _LOGGER.error("Can't set mode. Is device offline?")
+                _LOGGER.error("Can't set mode of %s", self._resource)
 
     @property
     def name(self):
@@ -109,5 +107,4 @@ class ArestData(object):
                 self._resource, self._pin), timeout=10)
             self.data = {'state': response.json()['return_value']}
         except requests.exceptions.ConnectionError:
-            _LOGGER.error("No route to device '%s'. Is device offline?",
-                          self._resource)
+            _LOGGER.error("No route to device '%s'", self._resource)