Hottis PV Modbus transformation

apps/abstraction/vendors/hottis_pv_modbus.py

@@ -23,17 +23,12 @@ def transform_relay_to_vendor(payload: dict[str, Any]) -> str:
 def transform_relay_to_abstract(payload: str) -> dict[str, Any]:
     """Transform Hottis Modbus relay payload to abstract format.
     
-    Hottis Modbus sends JSON like:
-    {"status": "Ok", "timestamp": "...", "state": false, "cnt": 528}
-    
-    Transformations:
-    - state: true  -> power: 'on'
-    - state: false -> power: 'off'
+    Hottis Modbus sends plain text 'on' or 'off'.
+    Example:
+    - Hottis PV Modbus: 'on'
+    - Abstract: {'power': 'on'}
     """
-    data = json.loads(payload)
-    state = data.get("state", False)
-    power = "on" if bool(state) else "off"
-    return {"power": power}
+    return {"power": payload.strip()}
 
 
 def transform_three_phase_powermeter_to_vendor(payload: dict[str, Any]) -> str: