diff --git a/homeassistant/components/wirelesstag/binary_sensor.py b/homeassistant/components/wirelesstag/binary_sensor.py
index 82c3a25590adf..711c2987735b9 100644
--- a/homeassistant/components/wirelesstag/binary_sensor.py
+++ b/homeassistant/components/wirelesstag/binary_sensor.py
@@ -100,6 +100,7 @@ def __init__(self, api, tag, sensor_type):
         super().__init__(api, tag)
         self._sensor_type = sensor_type
         self._name = f"{self._tag.name} {self.event.human_readable_name}"
+        self._attr_unique_id = f"{self.tag_id}_{self._sensor_type}"
 
     async def async_added_to_hass(self) -> None:
         """Register callbacks."""
diff --git a/homeassistant/components/wirelesstag/sensor.py b/homeassistant/components/wirelesstag/sensor.py
index e4505e59666a0..fd9a7898f920f 100644
--- a/homeassistant/components/wirelesstag/sensor.py
+++ b/homeassistant/components/wirelesstag/sensor.py
@@ -100,6 +100,7 @@ def __init__(self, api, tag, description):
         self._sensor_type = description.key
         self.entity_description = description
         self._name = self._tag.name
+        self._attr_unique_id = f"{self.tag_id}_{self._sensor_type}"
 
         # I want to see entity_id as:
         # sensor.wirelesstag_bedroom_temperature
diff --git a/homeassistant/components/wirelesstag/switch.py b/homeassistant/components/wirelesstag/switch.py
index 26c7d9384a6b6..df0f72aca186c 100644
--- a/homeassistant/components/wirelesstag/switch.py
+++ b/homeassistant/components/wirelesstag/switch.py
@@ -82,6 +82,7 @@ def __init__(self, api, tag, description: SwitchEntityDescription) -> None:
         super().__init__(api, tag)
         self.entity_description = description
         self._name = f"{self._tag.name} {description.name}"
+        self._attr_unique_id = f"{self.tag_id}_{description.key}"
 
     def turn_on(self, **kwargs: Any) -> None:
         """Turn on the switch."""