diff --git a/.coveragerc b/.coveragerc
index a666e001c6b..0eec1c3a0a6 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -59,6 +59,7 @@ omit =
     homeassistant/components/ampio/*
     homeassistant/components/android_ip_webcam/*
     homeassistant/components/androidtv/__init__.py
+    homeassistant/components/androidtv/diagnostics.py
     homeassistant/components/anel_pwrctrl/switch.py
     homeassistant/components/anthemav/media_player.py
     homeassistant/components/apcupsd/*
diff --git a/homeassistant/components/androidtv/const.py b/homeassistant/components/androidtv/const.py
index 9c7fd1d7de2..7f1e1288519 100644
--- a/homeassistant/components/androidtv/const.py
+++ b/homeassistant/components/androidtv/const.py
@@ -27,6 +27,7 @@ DEVICE_FIRETV = "firetv"
 DEVICE_CLASSES = [DEFAULT_DEVICE_CLASS, DEVICE_ANDROIDTV, DEVICE_FIRETV]
 
 PROP_ETHMAC = "ethmac"
+PROP_SERIALNO = "serialno"
 PROP_WIFIMAC = "wifimac"
 
 SIGNAL_CONFIG_ENTITY = "androidtv_config"
diff --git a/homeassistant/components/androidtv/diagnostics.py b/homeassistant/components/androidtv/diagnostics.py
new file mode 100644
index 00000000000..0a4245c40dc
--- /dev/null
+++ b/homeassistant/components/androidtv/diagnostics.py
@@ -0,0 +1,81 @@
+"""Diagnostics support for AndroidTV."""
+from __future__ import annotations
+
+from typing import Any
+
+import attr
+
+from homeassistant.components.diagnostics import REDACTED, async_redact_data
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import ATTR_CONNECTIONS, ATTR_IDENTIFIERS, CONF_UNIQUE_ID
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr, entity_registry as er
+
+from .const import ANDROID_DEV, DOMAIN, PROP_ETHMAC, PROP_SERIALNO, PROP_WIFIMAC
+
+TO_REDACT = {CONF_UNIQUE_ID}  # UniqueID contain MAC Address
+TO_REDACT_DEV = {PROP_ETHMAC, PROP_SERIALNO, PROP_WIFIMAC}
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, dict[str, Any]]:
+    """Return diagnostics for a config entry."""
+    data = {"entry": async_redact_data(entry.as_dict(), TO_REDACT)}
+    hass_data = hass.data[DOMAIN][entry.entry_id]
+
+    # Get information from AndroidTV library
+    aftv = hass_data[ANDROID_DEV]
+    data_dev = {"device_class": aftv.DEVICE_CLASS}
+    for prop, value in aftv.device_properties.items():
+        if prop in TO_REDACT_DEV and value:
+            data_dev[prop] = REDACTED
+        else:
+            data_dev[prop] = value
+    data["device_properties"] = data_dev
+
+    # Gather information how this AndroidTV device is represented in Home Assistant
+    device_registry = dr.async_get(hass)
+    entity_registry = er.async_get(hass)
+    hass_device = device_registry.async_get_device(
+        identifiers={(DOMAIN, str(entry.unique_id))}
+    )
+    if not hass_device:
+        return data
+
+    data["device"] = {
+        **attr.asdict(hass_device),
+        "entities": {},
+    }
+    data["device"][ATTR_IDENTIFIERS] = REDACTED
+    if ATTR_CONNECTIONS in data["device"]:
+        data["device"][ATTR_CONNECTIONS] = REDACTED
+
+    hass_entities = er.async_entries_for_device(
+        entity_registry,
+        device_id=hass_device.id,
+        include_disabled_entities=True,
+    )
+
+    for entity_entry in hass_entities:
+        state = hass.states.get(entity_entry.entity_id)
+        state_dict = None
+        if state:
+            state_dict = dict(state.as_dict())
+            # The entity_id is already provided at root level.
+            state_dict.pop("entity_id", None)
+            # The context doesn't provide useful information in this case.
+            state_dict.pop("context", None)
+
+        entity_dict = async_redact_data(
+            {
+                **attr.asdict(
+                    entity_entry, filter=lambda attr, value: attr.name != "entity_id"
+                ),
+                "state": state_dict,
+            },
+            TO_REDACT,
+        )
+        data["device"]["entities"][entity_entry.entity_id] = entity_dict
+
+    return data