diff --git a/homeassistant/components/iron_os/diagnostics.py b/homeassistant/components/iron_os/diagnostics.py
new file mode 100644
index 00000000000..e9545c24dec
--- /dev/null
+++ b/homeassistant/components/iron_os/diagnostics.py
@@ -0,0 +1,25 @@
+"""Diagnostics platform for IronOS integration."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.const import CONF_ADDRESS
+from homeassistant.core import HomeAssistant
+
+from . import IronOSConfigEntry
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, config_entry: IronOSConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+
+    return {
+        "config_entry_data": {
+            CONF_ADDRESS: config_entry.unique_id,
+        },
+        "device_info": config_entry.runtime_data.live_data.device_info,
+        "live_data": config_entry.runtime_data.live_data.data,
+        "settings_data": config_entry.runtime_data.settings.data,
+    }
diff --git a/homeassistant/components/iron_os/quality_scale.yaml b/homeassistant/components/iron_os/quality_scale.yaml
index 99fe33c4475..c80b8b5adfe 100644
--- a/homeassistant/components/iron_os/quality_scale.yaml
+++ b/homeassistant/components/iron_os/quality_scale.yaml
@@ -43,7 +43,7 @@ rules:
 
   # Gold
   devices: done
-  diagnostics: todo
+  diagnostics: done
   discovery-update-info:
     status: exempt
     comment: Device is not connected to an ip network. Other information from discovery is immutable and does not require updating.
diff --git a/tests/components/iron_os/snapshots/test_diagnostics.ambr b/tests/components/iron_os/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..f8db1262254
--- /dev/null
+++ b/tests/components/iron_os/snapshots/test_diagnostics.ambr
@@ -0,0 +1,18 @@
+# serializer version: 1
+# name: test_diagnostics
+  dict({
+    'config_entry_data': dict({
+      'address': 'c0:ff:ee:c0:ff:ee',
+    }),
+    'device_info': dict({
+      '__type': "<class 'pynecil.types.DeviceInfoResponse'>",
+      'repr': "DeviceInfoResponse(build='v2.22', device_id='c0ffeeC0', address='c0:ff:ee:c0:ff:ee', device_sn='0000c0ffeec0ffee', name='Pinecil-C0FFEEE', is_synced=False)",
+    }),
+    'live_data': dict({
+      '__type': "<class 'pynecil.types.LiveDataResponse'>",
+      'repr': 'LiveDataResponse(live_temp=298, setpoint_temp=300, dc_voltage=20.6, handle_temp=36.3, pwm_level=41, power_src=<PowerSource.PD: 3>, tip_resistance=6.2, uptime=1671, movement_time=10000, max_tip_temp_ability=460, tip_voltage=2212, hall_sensor=0, operating_mode=<OperatingMode.SOLDERING: 1>, estimated_power=24.8)',
+    }),
+    'settings_data': dict({
+    }),
+  })
+# ---
diff --git a/tests/components/iron_os/test_diagnostics.py b/tests/components/iron_os/test_diagnostics.py
new file mode 100644
index 00000000000..05f627e6bc6
--- /dev/null
+++ b/tests/components/iron_os/test_diagnostics.py
@@ -0,0 +1,29 @@
+"""Tests for IronOS diagnostics."""
+
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+@pytest.mark.usefixtures(
+    "entity_registry_enabled_by_default", "mock_pynecil", "ble_device"
+)
+async def test_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    config_entry: MockConfigEntry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test diagnostics."""
+    config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+    assert (
+        await get_diagnostics_for_config_entry(hass, hass_client, config_entry)
+        == snapshot
+    )