Add Xiaomi Miscale v1 and v2 (#1368)

esphome/const.py

@@ -244,6 +244,7 @@ CONF_IDLE_TIME = 'idle_time'
 CONF_IF = 'if'
 CONF_IIR_FILTER = 'iir_filter'
 CONF_ILLUMINANCE = 'illuminance'
+CONF_IMPEDANCE = 'impedance'
 CONF_INCLUDES = 'includes'
 CONF_INDEX = 'index'
 CONF_INDOOR = 'indoor'
@@ -565,6 +566,7 @@ CONF_WAKEUP_PIN = 'wakeup_pin'
 CONF_WARM_WHITE = 'warm_white'
 CONF_WARM_WHITE_COLOR_TEMPERATURE = 'warm_white_color_temperature'
 CONF_WATCHDOG_THRESHOLD = 'watchdog_threshold'
+CONF_WEIGHT = 'weight'
 CONF_WHILE = 'while'
 CONF_WHITE = 'white'
 CONF_WIDTH = 'width'
@@ -602,6 +604,7 @@ ICON_MAGNET = 'mdi:magnet'
 ICON_MOLECULE_CO2 = 'mdi:molecule-co2'
 ICON_MOTION_SENSOR = 'mdi:motion-sensor'
 ICON_NEW_BOX = 'mdi:new-box'
+ICON_OMEGA = 'mdi:omega'
 ICON_PERCENT = 'mdi:percent'
 ICON_POWER = 'mdi:power'
 ICON_PULSE = 'mdi:pulse'
@@ -610,6 +613,7 @@ ICON_RESTART = 'mdi:restart'
 ICON_ROTATE_RIGHT = 'mdi:rotate-right'
 ICON_RULER = 'mdi:ruler'
 ICON_SCALE = 'mdi:scale'
+ICON_SCALE_BATHROOM = 'mdi:scale-bathroom'
 ICON_SCREEN_ROTATION = 'mdi:screen-rotation'
 ICON_SIGN_DIRECTION = 'mdi:sign-direction'
 ICON_SIGNAL = 'mdi:signal-distance-variant'
@@ -636,6 +640,7 @@ UNIT_G = 'G'
 UNIT_HECTOPASCAL = 'hPa'
 UNIT_HERTZ = 'Hz'
 UNIT_KELVIN = 'K'
+UNIT_KILOGRAM = 'kg'
 UNIT_KILOMETER = 'km'
 UNIT_KILOMETER_PER_HOUR = 'km/h'
 UNIT_LUX = 'lx'