fix(media_player): parse real OWNSoundEvent dimensions and handle malformed RDS frames

custom_components/myhome/sound_source.py

@@ -292,6 +292,7 @@ async def async_set_frequency(self, megahertz: float) -> None:
         self._frequency_khz = kilohertz
         self._station = None
         self._attr_source = None
+        self._attr_media_title = None
         self.async_schedule_update_ha_state()
 
     async def async_play_media(self, media_type: str, media_id: str, **kwargs: Any) -> None:
@@ -326,15 +327,36 @@ async def async_play_media(self, media_type: str, media_id: str, **kwargs: Any)
     @callback
     def handle_event(self, message: OWNSoundEvent) -> None:
         """Apply a WHO=16 event addressed to this source device."""
-        dimension = getattr(message, "dimension", None)
-        values = [str(v) for v in (getattr(message, "dimension_value", None) or [])]
+        raw_dim = getattr(message, "dimension", getattr(message, "_dimension", None))
+        try:
+            dimension = int(raw_dim) if raw_dim is not None else None
+        except (ValueError, TypeError):
+            dimension = None
+
+        values = [
+            str(v)
+            for v in (
+                getattr(message, "dimension_value", None)
+                or getattr(message, "_dimension_value", None)
+                or getattr(message, "dimension_values", None)
+                or []
+            )
+        ]
 
         if dimension == 6 and values:
             self._set_frequency_from_bus(values[-1])
         elif dimension == 7 and values:
             self._set_station_from_bus(values[-1])
         elif dimension == 8 and values:
-            self._attr_media_title = rds_text(values)
+            if len(values) == 8:
+                self._attr_media_title = rds_text(values)
+            else:
+                LOGGER.debug(
+                    "%s: ignoring malformed RDS frame with %d values: %s",
+                    self.entity_id,
+                    len(values),
+                    values,
+                )
         elif getattr(message, "is_on", False):
             self._attr_state = MediaPlayerState.ON
         elif getattr(message, "is_off", False):
@@ -354,6 +376,7 @@ def _set_frequency_from_bus(self, raw: str) -> None:
                 self._frequency_khz = kilohertz
                 self._station = None
                 self._attr_source = None
+                self._attr_media_title = None
         else:
             LOGGER.debug(
                 "%s: ignoring reported frequency %s kHz, outside the FM band",

tests/fixtures/traces/f500_tuner/README.md

@@ -26,3 +26,9 @@ Authentic on-wire bus frames captured by `@manfredgittmaier-afk` on a live insta
    - Seek down: `*16*5100*101##` -> locks to previous station (e.g. 88.8 MHz).
 8. **RDS Blanking and Dynamic Text**:
    - After tuning, tuner sends 8 spaces `*#16*101*8*32*32*32*32*32*32*32*32##` before delivering station title.
+9. **Rotating RDS and Malformed Frames (`myhome_trace_MH200N_all_2026-09-26T20-00-28.json`)**:
+   - Reported in [PR #427 (comment 5849429368)](https://github.com/OpenWebNet-HA/MyHOME/pull/427#issuecomment-5849429368).
+   - Some stations rotate RDS PS text every ~5s (e.g. `*RADIO* ` / `**OOE** `).
+   - Rare hardware buffer glitches occasionally produce malformed 12-code frames (e.g. `*#16*101*8*42*42*79*79*69*42*79*79*69*42*42*32##`), which must be dropped to prevent state corruption.
+   - Live stepping sequence across presets 1–4 confirms frequency, station preset, and RDS tracking across real `OWNSoundEvent` replies.
+