diff --git a/homeassistant/components/mysensors/climate.py b/homeassistant/components/mysensors/climate.py
index a42861c5fa2..eb54a76b8a8 100644
--- a/homeassistant/components/mysensors/climate.py
+++ b/homeassistant/components/mysensors/climate.py
@@ -175,10 +175,6 @@ class MySensorsHVAC(MySensorsChildEntity, ClimateEntity):
             self.gateway.set_child_value(
                 self.node_id, self.child_id, value_type, value, ack=1
             )
-            if self.assumed_state:
-                # Optimistically assume that device has changed state
-                self._values[value_type] = value
-                self.async_write_ha_state()
 
     async def async_set_fan_mode(self, fan_mode: str) -> None:
         """Set new target temperature."""
@@ -186,10 +182,6 @@ class MySensorsHVAC(MySensorsChildEntity, ClimateEntity):
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_HVAC_SPEED, fan_mode, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that device has changed state
-            self._values[set_req.V_HVAC_SPEED] = fan_mode
-            self.async_write_ha_state()
 
     async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
         """Set new target temperature."""
@@ -200,10 +192,6 @@ class MySensorsHVAC(MySensorsChildEntity, ClimateEntity):
             DICT_HA_TO_MYS[hvac_mode],
             ack=1,
         )
-        if self.assumed_state:
-            # Optimistically assume that device has changed state
-            self._values[self.value_type] = hvac_mode
-            self.async_write_ha_state()
 
     @callback
     def _async_update(self) -> None:
diff --git a/homeassistant/components/mysensors/cover.py b/homeassistant/components/mysensors/cover.py
index 2ac0367d1fc..84346a5d10a 100644
--- a/homeassistant/components/mysensors/cover.py
+++ b/homeassistant/components/mysensors/cover.py
@@ -7,7 +7,7 @@ from typing import Any
 
 from homeassistant.components.cover import ATTR_POSITION, CoverEntity
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import STATE_OFF, STATE_ON, Platform
+from homeassistant.const import STATE_ON, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
@@ -110,13 +110,6 @@ class MySensorsCover(MySensorsChildEntity, CoverEntity):
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_UP, 1, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that cover has changed state.
-            if set_req.V_DIMMER in self._values:
-                self._values[set_req.V_DIMMER] = 100
-            else:
-                self._values[set_req.V_LIGHT] = STATE_ON
-            self.async_write_ha_state()
 
     async def async_close_cover(self, **kwargs: Any) -> None:
         """Move the cover down."""
@@ -124,13 +117,6 @@ class MySensorsCover(MySensorsChildEntity, CoverEntity):
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_DOWN, 1, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that cover has changed state.
-            if set_req.V_DIMMER in self._values:
-                self._values[set_req.V_DIMMER] = 0
-            else:
-                self._values[set_req.V_LIGHT] = STATE_OFF
-            self.async_write_ha_state()
 
     async def async_set_cover_position(self, **kwargs: Any) -> None:
         """Move the cover to a specific position."""
@@ -139,10 +125,6 @@ class MySensorsCover(MySensorsChildEntity, CoverEntity):
         self.gateway.set_child_value(
             self.node_id, self.child_id, set_req.V_DIMMER, position, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that cover has changed state.
-            self._values[set_req.V_DIMMER] = position
-            self.async_write_ha_state()
 
     async def async_stop_cover(self, **kwargs: Any) -> None:
         """Stop the device."""
diff --git a/homeassistant/components/mysensors/light.py b/homeassistant/components/mysensors/light.py
index 4fa9eaa8ea6..fa5e625c72b 100644
--- a/homeassistant/components/mysensors/light.py
+++ b/homeassistant/components/mysensors/light.py
@@ -12,7 +12,7 @@ from homeassistant.components.light import (
     LightEntity,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import STATE_OFF, STATE_ON, Platform
+from homeassistant.const import STATE_ON, Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
@@ -77,11 +77,6 @@ class MySensorsLight(MySensorsChildEntity, LightEntity):
             self.node_id, self.child_id, set_req.V_LIGHT, 1, ack=1
         )
 
-        if self.assumed_state:
-            # optimistically assume that light has changed state
-            self._state = True
-            self._values[set_req.V_LIGHT] = STATE_ON
-
     def _turn_on_dimmer(self, **kwargs: Any) -> None:
         """Turn on dimmer child device."""
         set_req = self.gateway.const.SetReq
@@ -98,20 +93,10 @@ class MySensorsLight(MySensorsChildEntity, LightEntity):
             self.node_id, self.child_id, set_req.V_DIMMER, percent, ack=1
         )
 
-        if self.assumed_state:
-            # optimistically assume that light has changed state
-            self._attr_brightness = brightness
-            self._values[set_req.V_DIMMER] = percent
-
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn the device off."""
         value_type = self.gateway.const.SetReq.V_LIGHT
         self.gateway.set_child_value(self.node_id, self.child_id, value_type, 0, ack=1)
-        if self.assumed_state:
-            # optimistically assume that light has changed state
-            self._state = False
-            self._values[value_type] = STATE_OFF
-            self.async_write_ha_state()
 
     @callback
     def _async_update_light(self) -> None:
@@ -139,8 +124,6 @@ class MySensorsLightDimmer(MySensorsLight):
         """Turn the device on."""
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
-        if self.assumed_state:
-            self.async_write_ha_state()
 
     @callback
     def _async_update(self) -> None:
@@ -161,8 +144,6 @@ class MySensorsLightRGB(MySensorsLight):
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
         self._turn_on_rgb(**kwargs)
-        if self.assumed_state:
-            self.async_write_ha_state()
 
     def _turn_on_rgb(self, **kwargs: Any) -> None:
         """Turn on RGB child device."""
@@ -176,11 +157,6 @@ class MySensorsLightRGB(MySensorsLight):
             self.node_id, self.child_id, self.value_type, hex_color, ack=1
         )
 
-        if self.assumed_state:
-            # optimistically assume that light has changed state
-            self._attr_rgb_color = new_rgb
-            self._values[self.value_type] = hex_color
-
     @callback
     def _async_update(self) -> None:
         """Update the controller with the latest value from a sensor."""
@@ -209,8 +185,6 @@ class MySensorsLightRGBW(MySensorsLightRGB):
         self._turn_on_light()
         self._turn_on_dimmer(**kwargs)
         self._turn_on_rgbw(**kwargs)
-        if self.assumed_state:
-            self.async_write_ha_state()
 
     def _turn_on_rgbw(self, **kwargs: Any) -> None:
         """Turn on RGBW child device."""
@@ -224,11 +198,6 @@ class MySensorsLightRGBW(MySensorsLightRGB):
             self.node_id, self.child_id, self.value_type, hex_color, ack=1
         )
 
-        if self.assumed_state:
-            # optimistically assume that light has changed state
-            self._attr_rgbw_color = new_rgbw
-            self._values[self.value_type] = hex_color
-
     @callback
     def _async_update_rgb_or_w(self) -> None:
         """Update the controller with values from RGBW child."""
diff --git a/homeassistant/components/mysensors/switch.py b/homeassistant/components/mysensors/switch.py
index 499124919b5..9b57102a94c 100644
--- a/homeassistant/components/mysensors/switch.py
+++ b/homeassistant/components/mysensors/switch.py
@@ -6,7 +6,7 @@ from typing import Any
 
 from homeassistant.components.switch import SwitchEntity
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import STATE_OFF, STATE_ON, Platform
+from homeassistant.const import STATE_ON, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
@@ -69,17 +69,9 @@ class MySensorsSwitch(MySensorsChildEntity, SwitchEntity):
         self.gateway.set_child_value(
             self.node_id, self.child_id, self.value_type, 1, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that switch has changed state
-            self._values[self.value_type] = STATE_ON
-            self.async_write_ha_state()
 
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn the switch off."""
         self.gateway.set_child_value(
             self.node_id, self.child_id, self.value_type, 0, ack=1
         )
-        if self.assumed_state:
-            # Optimistically assume that switch has changed state
-            self._values[self.value_type] = STATE_OFF
-            self.async_write_ha_state()