diff --git a/homeassistant/components/raspihats/binary_sensor.py b/homeassistant/components/raspihats/binary_sensor.py
index f8fbc0d010f..e027d766bcb 100644
--- a/homeassistant/components/raspihats/binary_sensor.py
+++ b/homeassistant/components/raspihats/binary_sensor.py
@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import logging
+from typing import TYPE_CHECKING
 
 import voluptuous as vol
 
@@ -108,6 +109,11 @@ class I2CHatBinarySensor(BinarySensorEntity):
         self._device_class = device_class
         self._state = self.I2C_HATS_MANAGER.read_di(self._address, self._channel)
 
+    async def async_added_to_hass(self) -> None:
+        """Register callbacks."""
+        if TYPE_CHECKING:
+            assert self.I2C_HATS_MANAGER
+
         def online_callback():
             """Call fired when board is online."""
             self.schedule_update_ha_state()
diff --git a/homeassistant/components/raspihats/switch.py b/homeassistant/components/raspihats/switch.py
index c67a2b4ab8f..bf9c14e87ed 100644
--- a/homeassistant/components/raspihats/switch.py
+++ b/homeassistant/components/raspihats/switch.py
@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import logging
+from typing import TYPE_CHECKING
 
 import voluptuous as vol
 
@@ -108,6 +109,11 @@ class I2CHatSwitch(ToggleEntity):
                 state = initial_state
             self.I2C_HATS_MANAGER.write_dq(self._address, self._channel, state)
 
+    async def async_added_to_hass(self) -> None:
+        """Register callbacks."""
+        if TYPE_CHECKING:
+            assert self.I2C_HATS_MANAGER
+
         def online_callback():
             """Call fired when board is online."""
             self.schedule_update_ha_state()