[WIP] consider SEA config in frappy(..) command

devices.py

@@ -247,6 +247,10 @@ class FrappyNode(SecNodeDevice, Moveable):
         super().doInit(mode)
 
     def doRead(self, maxage=0):
+        try:
+            return self.secnode.descriptive_data['_frappy_config']
+        except (KeyError, AttributeError):
+            pass
         if self._cfgvalue is None and self._cache:
             self._cfgvalue = self._cache.get(self, 'value')
         return self._cfgvalue
@@ -264,12 +268,14 @@ class FrappyNode(SecNodeDevice, Moveable):
 
     @classmethod
     def config_dirs(cls, ins, service):
+        # TODO: no more needed after allowing ~cfg in FrappyManager.do_start
         sm = cls._service_manager
         sm.get_info()
         return sm.config_dirs(ins, service)
 
     @classmethod
     def available_cfg(cls, service):
+        # TODO: no more needed after allowing ~cfg in FrappyManager.do_start
         ins = config.instrument
         available_cfg = set()
         for d in cls.config_dirs(ins, service):