diff --git a/homeassistant/components/hdfury/diagnostics.py b/homeassistant/components/hdfury/diagnostics.py
new file mode 100644
index 000000000000..c561a97d4ee3
--- /dev/null
+++ b/homeassistant/components/hdfury/diagnostics.py
@@ -0,0 +1,21 @@
+"""Diagnostics for HDFury Integration."""
+
+from typing import Any
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from .coordinator import HDFuryCoordinator
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    coordinator: HDFuryCoordinator = entry.runtime_data
+
+    return {
+        "board": coordinator.data.board,
+        "info": coordinator.data.info,
+        "config": coordinator.data.config,
+    }
diff --git a/homeassistant/components/hdfury/quality_scale.yaml b/homeassistant/components/hdfury/quality_scale.yaml
index 614a3344f105..8a978b1eeb03 100644
--- a/homeassistant/components/hdfury/quality_scale.yaml
+++ b/homeassistant/components/hdfury/quality_scale.yaml
@@ -43,7 +43,7 @@ rules:
 
   # Gold
   devices: done
-  diagnostics: todo
+  diagnostics: done
   discovery-update-info: todo
   discovery: todo
   docs-data-update: todo
diff --git a/tests/components/hdfury/snapshots/test_diagnostics.ambr b/tests/components/hdfury/snapshots/test_diagnostics.ambr
new file mode 100644
index 000000000000..448e4f8ff3da
--- /dev/null
+++ b/tests/components/hdfury/snapshots/test_diagnostics.ambr
@@ -0,0 +1,30 @@
+# serializer version: 1
+# name: test_diagnostics
+  dict({
+    'board': dict({
+      'hostname': 'VRROOM-02',
+      'ipaddress': '192.168.1.123',
+      'pcbv': '3',
+      'serial': '000123456789',
+      'version': 'FW: 0.61',
+    }),
+    'config': dict({
+      'autosw': '1',
+      'htpcmode0': '0',
+      'htpcmode1': '0',
+      'htpcmode2': '0',
+      'htpcmode3': '0',
+      'iractive': '1',
+      'macaddr': 'c7:1c:df:9d:f6:40',
+      'mutetx0': '1',
+      'mutetx1': '1',
+      'oled': '1',
+      'relay': '0',
+    }),
+    'info': dict({
+      'opmode': '0',
+      'portseltx0': '0',
+      'portseltx1': '4',
+    }),
+  })
+# ---
diff --git a/tests/components/hdfury/test_diagnostics.py b/tests/components/hdfury/test_diagnostics.py
new file mode 100644
index 000000000000..c602e06ce258
--- /dev/null
+++ b/tests/components/hdfury/test_diagnostics.py
@@ -0,0 +1,31 @@
+"""Tests for the HDFury diagnostics."""
+
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.hdfury import PLATFORMS
+from homeassistant.core import HomeAssistant
+import homeassistant.helpers.entity_registry as er
+
+from . import setup_integration
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+async def test_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+    entity_registry: er.EntityRegistry,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test HDFury diagnostics."""
+
+    await setup_integration(hass, mock_config_entry, PLATFORMS)
+
+    diagnostics = await get_diagnostics_for_config_entry(
+        hass, hass_client, mock_config_entry
+    )
+
+    assert diagnostics == snapshot