Add diagnostics for screenlogic (#67368)

.coveragerc

@@ -995,6 +995,7 @@ omit =
     homeassistant/components/screenlogic/__init__.py
     homeassistant/components/screenlogic/binary_sensor.py
     homeassistant/components/screenlogic/climate.py
+    homeassistant/components/screenlogic/diagnostics.py
     homeassistant/components/screenlogic/light.py
     homeassistant/components/screenlogic/number.py
     homeassistant/components/screenlogic/sensor.py

homeassistant/components/screenlogic/diagnostics.py

@@ -0,0 +1,21 @@
+"""Diagnostics for Screenlogic."""
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from . import ScreenlogicDataUpdateCoordinator
+from .const import DOMAIN
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, config_entry: ConfigEntry
+) -> dict:
+    """Return diagnostics for a config entry."""
+    coordinator: ScreenlogicDataUpdateCoordinator = hass.data[DOMAIN][
+        config_entry.entry_id
+    ]
+
+    return {
+        "config_entry": config_entry.as_dict(),
+        "data": coordinator.data,
+    }