Add and use UNIT_VOLT constant

homeassistant/components/apcupsd/sensor.py

@@ -12,6 +12,7 @@
     TIME_MINUTES,
     TIME_SECONDS,
     UNIT_PERCENTAGE,
+    UNIT_VOLT,
 )
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
@@ -29,7 +30,7 @@
     "badbatts": ["Bad Batteries", "", "mdi:information-outline"],
     "battdate": ["Battery Replaced", "", "mdi:calendar-clock"],
     "battstat": ["Battery Status", "", "mdi:information-outline"],
-    "battv": ["Battery Voltage", "V", "mdi:flash"],
+    "battv": ["Battery Voltage", UNIT_VOLT, "mdi:flash"],
     "bcharge": ["Battery", UNIT_PERCENTAGE, "mdi:battery"],
     "cable": ["Cable Type", "", "mdi:ethernet-cable"],
     "cumonbatt": ["Total Time on Battery", "", "mdi:timer"],
@@ -42,33 +43,33 @@
     "endapc": ["Date and Time", "", "mdi:calendar-clock"],
     "extbatts": ["External Batteries", "", "mdi:information-outline"],
     "firmware": ["Firmware Version", "", "mdi:information-outline"],
-    "hitrans": ["Transfer High", "V", "mdi:flash"],
+    "hitrans": ["Transfer High", UNIT_VOLT, "mdi:flash"],
     "hostname": ["Hostname", "", "mdi:information-outline"],
     "humidity": ["Ambient Humidity", UNIT_PERCENTAGE, "mdi:water-percent"],
     "itemp": ["Internal Temperature", TEMP_CELSIUS, "mdi:thermometer"],
     "lastxfer": ["Last Transfer", "", "mdi:transfer"],
     "linefail": ["Input Voltage Status", "", "mdi:information-outline"],
     "linefreq": ["Line Frequency", "Hz", "mdi:information-outline"],
-    "linev": ["Input Voltage", "V", "mdi:flash"],
+    "linev": ["Input Voltage", UNIT_VOLT, "mdi:flash"],
     "loadpct": ["Load", UNIT_PERCENTAGE, "mdi:gauge"],
     "loadapnt": ["Load Apparent Power", UNIT_PERCENTAGE, "mdi:gauge"],
-    "lotrans": ["Transfer Low", "V", "mdi:flash"],
+    "lotrans": ["Transfer Low", UNIT_VOLT, "mdi:flash"],
     "mandate": ["Manufacture Date", "", "mdi:calendar"],
     "masterupd": ["Master Update", "", "mdi:information-outline"],
-    "maxlinev": ["Input Voltage High", "V", "mdi:flash"],
+    "maxlinev": ["Input Voltage High", UNIT_VOLT, "mdi:flash"],
     "maxtime": ["Battery Timeout", "", "mdi:timer-off"],
     "mbattchg": ["Battery Shutdown", UNIT_PERCENTAGE, "mdi:battery-alert"],
-    "minlinev": ["Input Voltage Low", "V", "mdi:flash"],
+    "minlinev": ["Input Voltage Low", UNIT_VOLT, "mdi:flash"],
     "mintimel": ["Shutdown Time", "", "mdi:timer"],
     "model": ["Model", "", "mdi:information-outline"],
-    "nombattv": ["Battery Nominal Voltage", "V", "mdi:flash"],
-    "nominv": ["Nominal Input Voltage", "V", "mdi:flash"],
-    "nomoutv": ["Nominal Output Voltage", "V", "mdi:flash"],
+    "nombattv": ["Battery Nominal Voltage", UNIT_VOLT, "mdi:flash"],
+    "nominv": ["Nominal Input Voltage", UNIT_VOLT, "mdi:flash"],
+    "nomoutv": ["Nominal Output Voltage", UNIT_VOLT, "mdi:flash"],
     "nompower": ["Nominal Output Power", POWER_WATT, "mdi:flash"],
     "nomapnt": ["Nominal Apparent Power", "VA", "mdi:flash"],
     "numxfers": ["Transfer Count", "", "mdi:counter"],
     "outcurnt": ["Output Current", "A", "mdi:flash"],
-    "outputv": ["Output Voltage", "V", "mdi:flash"],
+    "outputv": ["Output Voltage", UNIT_VOLT, "mdi:flash"],
     "reg1": ["Register 1 Fault", "", "mdi:information-outline"],
     "reg2": ["Register 2 Fault", "", "mdi:information-outline"],
     "reg3": ["Register 3 Fault", "", "mdi:information-outline"],
@@ -95,7 +96,7 @@
     " Minutes": TIME_MINUTES,
     " Seconds": TIME_SECONDS,
     " Percent": UNIT_PERCENTAGE,
-    " Volts": "V",
+    " Volts": UNIT_VOLT,
     " Ampere": "A",
     " Volt-Ampere": "VA",
     " Watts": POWER_WATT,

homeassistant/components/dsmr_reader/definitions.py

@@ -1,6 +1,6 @@
 """Definitions for DSMR Reader sensors added to MQTT."""
 
-from homeassistant.const import ENERGY_KILO_WATT_HOUR, VOLUME_CUBIC_METERS
+from homeassistant.const import ENERGY_KILO_WATT_HOUR, UNIT_VOLT, VOLUME_CUBIC_METERS
 
 
 def dsmr_transform(value):
@@ -86,17 +86,17 @@ def tariff_transform(value):
     "dsmr/reading/phase_voltage_l1": {
         "name": "Current voltage L1",
         "icon": "mdi:flash",
-        "unit": "V",
+        "unit": UNIT_VOLT,
     },
     "dsmr/reading/phase_voltage_l2": {
         "name": "Current voltage L2",
         "icon": "mdi:flash",
-        "unit": "V",
+        "unit": UNIT_VOLT,
     },
     "dsmr/reading/phase_voltage_l3": {
         "name": "Current voltage L3",
         "icon": "mdi:flash",
-        "unit": "V",
+        "unit": UNIT_VOLT,
     },
     "dsmr/consumption/gas/delivered": {
         "name": "Gas usage",

homeassistant/components/elkm1/sensor.py

@@ -7,6 +7,8 @@
 )
 from elkm1_lib.util import pretty_const, username
 
+from homeassistant.const import UNIT_VOLT
+
 from . import ElkAttachedEntity, create_elk_entities
 from .const import DOMAIN
 
@@ -195,7 +197,7 @@ def unit_of_measurement(self):
         if self._element.definition == ZoneType.TEMPERATURE.value:
             return self._temperature_unit
         if self._element.definition == ZoneType.ANALOG_ZONE.value:
-            return "V"
+            return UNIT_VOLT
         return None
 
     def _element_changed(self, element, changeset):

homeassistant/components/envirophat/sensor.py

@@ -6,7 +6,7 @@
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA
-from homeassistant.const import CONF_DISPLAY_OPTIONS, CONF_NAME, TEMP_CELSIUS
+from homeassistant.const import CONF_DISPLAY_OPTIONS, CONF_NAME, TEMP_CELSIUS, UNIT_VOLT
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.util import Throttle
@@ -31,10 +31,10 @@
     "magnetometer_z": ["magnetometer_z", " ", "mdi:magnet"],
     "temperature": ["temperature", TEMP_CELSIUS, "mdi:thermometer"],
     "pressure": ["pressure", "hPa", "mdi:gauge"],
-    "voltage_0": ["voltage_0", "V", "mdi:flash"],
-    "voltage_1": ["voltage_1", "V", "mdi:flash"],
-    "voltage_2": ["voltage_2", "V", "mdi:flash"],
-    "voltage_3": ["voltage_3", "V", "mdi:flash"],
+    "voltage_0": ["voltage_0", UNIT_VOLT, "mdi:flash"],
+    "voltage_1": ["voltage_1", UNIT_VOLT, "mdi:flash"],
+    "voltage_2": ["voltage_2", UNIT_VOLT, "mdi:flash"],
+    "voltage_3": ["voltage_3", UNIT_VOLT, "mdi:flash"],
 }
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(

homeassistant/components/greeneye_monitor/sensor.py

@@ -8,6 +8,7 @@
     TIME_HOURS,
     TIME_MINUTES,
     TIME_SECONDS,
+    UNIT_VOLT,
 )
 from homeassistant.helpers.entity import Entity
 
@@ -310,4 +311,4 @@ def state(self):
     @property
     def unit_of_measurement(self):
         """Return the unit of measurement for this sensor."""
-        return "V"
+        return UNIT_VOLT

homeassistant/components/growatt_server/sensor.py

@@ -13,6 +13,7 @@
     CONF_PASSWORD,
     CONF_USERNAME,
     ENERGY_KILO_WATT_HOUR,
+    UNIT_VOLT,
 )
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
@@ -57,17 +58,17 @@
         "e_total",
         "power",
     ),
-    "inverter_voltage_input_1": ("Input 1 voltage", "V", "vpv1", None),
+    "inverter_voltage_input_1": ("Input 1 voltage", UNIT_VOLT, "vpv1", None),
     "inverter_amperage_input_1": ("Input 1 Amperage", "A", "ipv1", None),
     "inverter_wattage_input_1": ("Input 1 Wattage", "W", "ppv1", "power"),
-    "inverter_voltage_input_2": ("Input 2 voltage", "V", "vpv2", None),
+    "inverter_voltage_input_2": ("Input 2 voltage", UNIT_VOLT, "vpv2", None),
     "inverter_amperage_input_2": ("Input 2 Amperage", "A", "ipv2", None),
     "inverter_wattage_input_2": ("Input 2 Wattage", "W", "ppv2", "power"),
-    "inverter_voltage_input_3": ("Input 3 voltage", "V", "vpv3", None),
+    "inverter_voltage_input_3": ("Input 3 voltage", UNIT_VOLT, "vpv3", None),
     "inverter_amperage_input_3": ("Input 3 Amperage", "A", "ipv3", None),
     "inverter_wattage_input_3": ("Input 3 Wattage", "W", "ppv3", "power"),
     "inverter_internal_wattage": ("Internal wattage", "W", "ppv", "power"),
-    "inverter_reactive_voltage": ("Reactive voltage", "V", "vacr", None),
+    "inverter_reactive_voltage": ("Reactive voltage", UNIT_VOLT, "vacr", None),
     "inverter_inverter_reactive_amperage": ("Reactive amperage", "A", "iacr", None),
     "inverter_frequency": ("AC frequency", "Hz", "fac", None),
     "inverter_current_wattage": ("Output power", "W", "pac", "power"),

homeassistant/components/homematic/sensor.py

@@ -11,6 +11,7 @@
     SPEED_KILOMETERS_PER_HOUR,
     TEMP_CELSIUS,
     UNIT_PERCENTAGE,
+    UNIT_VOLT,
     VOLUME_CUBIC_METERS,
 )
 
@@ -40,7 +41,7 @@
     "BRIGHTNESS": "#",
     "POWER": POWER_WATT,
     "CURRENT": "mA",
-    "VOLTAGE": "V",
+    "VOLTAGE": UNIT_VOLT,
     "ENERGY_COUNTER": ENERGY_WATT_HOUR,
     "GAS_POWER": VOLUME_CUBIC_METERS,
     "GAS_ENERGY_COUNTER": VOLUME_CUBIC_METERS,

homeassistant/components/isy994/sensor.py

@@ -20,6 +20,7 @@
     TIME_YEARS,
     UNIT_PERCENTAGE,
     UNIT_UV_INDEX,
+    UNIT_VOLT,
 )
 from homeassistant.helpers.typing import ConfigType
 
@@ -91,7 +92,7 @@
     "65": "SML",
     "69": "gal",
     "71": UNIT_UV_INDEX,
-    "72": "V",
+    "72": UNIT_VOLT,
     "73": POWER_WATT,
     "74": "W/m²",
     "75": "weekday",

homeassistant/components/juicenet/sensor.py

@@ -1,7 +1,13 @@
 """Support for monitoring juicenet/juicepoint/juicebox based EVSE sensors."""
 import logging
 
-from homeassistant.const import ENERGY_WATT_HOUR, POWER_WATT, TEMP_CELSIUS, TIME_SECONDS
+from homeassistant.const import (
+    ENERGY_WATT_HOUR,
+    POWER_WATT,
+    TEMP_CELSIUS,
+    TIME_SECONDS,
+    UNIT_VOLT,
+)
 from homeassistant.helpers.entity import Entity
 
 from . import DOMAIN, JuicenetDevice
@@ -11,7 +17,7 @@
 SENSOR_TYPES = {
     "status": ["Charging Status", None],
     "temperature": ["Temperature", TEMP_CELSIUS],
-    "voltage": ["Voltage", "V"],
+    "voltage": ["Voltage", UNIT_VOLT],
     "amps": ["Amps", "A"],
     "watts": ["Watts", POWER_WATT],
     "charge_time": ["Charge time", TIME_SECONDS],

homeassistant/components/lcn/const.py

@@ -1,7 +1,12 @@
 """Constants for the LCN component."""
 from itertools import product
 
-from homeassistant.const import TEMP_CELSIUS, TEMP_FAHRENHEIT, UNIT_PERCENTAGE
+from homeassistant.const import (
+    TEMP_CELSIUS,
+    TEMP_FAHRENHEIT,
+    UNIT_PERCENTAGE,
+    UNIT_VOLT,
+)
 
 DOMAIN = "lcn"
 DATA_LCN = "lcn"
@@ -157,7 +162,7 @@
     "PERCENT",
     "PPM",
     "VOLT",
-    "V",
+    UNIT_VOLT,
     "AMPERE",
     "AMP",
     "A",

homeassistant/components/mysensors/sensor.py

@@ -8,6 +8,7 @@
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
     UNIT_PERCENTAGE,
+    UNIT_VOLT,
 )
 
 SENSORS = {
@@ -35,7 +36,7 @@
         "S_VIBRATION": ["Hz", None],
         "S_LIGHT_LEVEL": ["lx", "mdi:white-balance-sunny"],
     },
-    "V_VOLTAGE": ["V", "mdi:flash"],
+    "V_VOLTAGE": [UNIT_VOLT, "mdi:flash"],
     "V_CURRENT": ["A", "mdi:flash-auto"],
     "V_PH": ["pH", None],
     "V_ORP": ["mV", None],

homeassistant/components/nut/const.py

@@ -4,7 +4,13 @@
     DEVICE_CLASS_POWER,
     DEVICE_CLASS_TEMPERATURE,
 )
-from homeassistant.const import POWER_WATT, TEMP_CELSIUS, TIME_SECONDS, UNIT_PERCENTAGE
+from homeassistant.const import (
+    POWER_WATT,
+    TEMP_CELSIUS,
+    TIME_SECONDS,
+    UNIT_PERCENTAGE,
+    UNIT_VOLT,
+)
 
 DOMAIN = "nut"
 
@@ -93,10 +99,15 @@
         None,
     ],
     "battery.charger.status": ["Charging Status", "", "mdi:information-outline", None],
-    "battery.voltage": ["Battery Voltage", "V", "mdi:flash", None],
-    "battery.voltage.nominal": ["Nominal Battery Voltage", "V", "mdi:flash", None],
-    "battery.voltage.low": ["Low Battery Voltage", "V", "mdi:flash", None],
-    "battery.voltage.high": ["High Battery Voltage", "V", "mdi:flash", None],
+    "battery.voltage": ["Battery Voltage", UNIT_VOLT, "mdi:flash", None],
+    "battery.voltage.nominal": [
+        "Nominal Battery Voltage",
+        UNIT_VOLT,
+        "mdi:flash",
+        None,
+    ],
+    "battery.voltage.low": ["Low Battery Voltage", UNIT_VOLT, "mdi:flash", None],
+    "battery.voltage.high": ["High Battery Voltage", UNIT_VOLT, "mdi:flash", None],
     "battery.capacity": ["Battery Capacity", "Ah", "mdi:flash", None],
     "battery.current": ["Battery Current", "A", "mdi:flash", None],
     "battery.current.total": ["Total Battery Current", "A", "mdi:flash", None],
@@ -136,16 +147,16 @@
         "mdi:information-outline",
         None,
     ],
-    "input.transfer.low": ["Low Voltage Transfer", "V", "mdi:flash", None],
-    "input.transfer.high": ["High Voltage Transfer", "V", "mdi:flash", None],
+    "input.transfer.low": ["Low Voltage Transfer", UNIT_VOLT, "mdi:flash", None],
+    "input.transfer.high": ["High Voltage Transfer", UNIT_VOLT, "mdi:flash", None],
     "input.transfer.reason": [
         "Voltage Transfer Reason",
         "",
         "mdi:information-outline",
         None,
     ],
-    "input.voltage": ["Input Voltage", "V", "mdi:flash", None],
-    "input.voltage.nominal": ["Nominal Input Voltage", "V", "mdi:flash", None],
+    "input.voltage": ["Input Voltage", UNIT_VOLT, "mdi:flash", None],
+    "input.voltage.nominal": ["Nominal Input Voltage", UNIT_VOLT, "mdi:flash", None],
     "input.frequency": ["Input Line Frequency", "hz", "mdi:flash", None],
     "input.frequency.nominal": [
         "Nominal Input Line Frequency",
@@ -161,8 +172,8 @@
     ],
     "output.current": ["Output Current", "A", "mdi:flash", None],
     "output.current.nominal": ["Nominal Output Current", "A", "mdi:flash", None],
-    "output.voltage": ["Output Voltage", "V", "mdi:flash", None],
-    "output.voltage.nominal": ["Nominal Output Voltage", "V", "mdi:flash", None],
+    "output.voltage": ["Output Voltage", UNIT_VOLT, "mdi:flash", None],
+    "output.voltage.nominal": ["Nominal Output Voltage", UNIT_VOLT, "mdi:flash", None],
     "output.frequency": ["Output Frequency", "hz", "mdi:flash", None],
     "output.frequency.nominal": ["Nominal Output Frequency", "hz", "mdi:flash", None],
 }

homeassistant/components/onewire/sensor.py

@@ -8,7 +8,13 @@
 import voluptuous as vol
 
 from homeassistant.components.sensor import PLATFORM_SCHEMA
-from homeassistant.const import CONF_HOST, CONF_PORT, TEMP_CELSIUS, UNIT_PERCENTAGE
+from homeassistant.const import (
+    CONF_HOST,
+    CONF_PORT,
+    TEMP_CELSIUS,
+    UNIT_PERCENTAGE,
+    UNIT_VOLT,
+)
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 
@@ -75,9 +81,9 @@
     "counter_a": ["counter", "count"],
     "counter_b": ["counter", "count"],
     "HobbyBoard": ["none", "none"],
-    "voltage": ["voltage", "V"],
-    "voltage_VAD": ["voltage", "V"],
-    "voltage_VDD": ["voltage", "V"],
+    "voltage": ["voltage", UNIT_VOLT],
+    "voltage_VAD": ["voltage", UNIT_VOLT],
+    "voltage_VDD": ["voltage", UNIT_VOLT],
     "current": ["current", "A"],
 }
 

homeassistant/components/smappee/sensor.py

@@ -6,6 +6,7 @@
     ENERGY_KILO_WATT_HOUR,
     POWER_WATT,
     UNIT_PERCENTAGE,
+    UNIT_VOLT,
     VOLUME_CUBIC_METERS,
 )
 from homeassistant.helpers.entity import Entity
@@ -25,7 +26,7 @@
         "active_power",
     ],
     "current": ["Current", "mdi:gauge", "local", "A", "current"],
-    "voltage": ["Voltage", "mdi:gauge", "local", "V", "voltage"],
+    "voltage": ["Voltage", "mdi:gauge", "local", UNIT_VOLT, "voltage"],
     "active_cosfi": [
         "Power Factor",
         "mdi:gauge",