strip leading underscore from secop parameter names

+ other fixes and debugging prints

secop.py

@@ -54,7 +54,7 @@ class SecopStream(Stream):
             self.device = self.device[:-7]
         self.tags['device'] = self.device
         self.modules = self.descr['modules']
-        self.convert = {}
+        self.param_info = {}
         self.tags_dict = TagsDict(self.tags)
         for mod, moddesc in self.modules.items():
             for key in ('_original_id', 'original_id'):
@@ -62,10 +62,12 @@ class SecopStream(Stream):
                 if value:
                     self.tags_dict[mod] = dict(self.tags, device=value)
                     break
-            for param, desc in moddesc['accessibles'].items():
+            parameters = moddesc['accessibles']
+            for param, desc in parameters.items():
                 dt = desc['datainfo']
                 if dt['type'] in ('double', 'int', 'enum'):
-                    self.convert[mod, param] = float
+                    stripped = param[1:] if param.startswith('_') else param
+                    self.param_info[mod, param] = float, (mod, param if stripped in parameters else stripped)
         self.send('activate')
 
     def ping(self):
@@ -81,9 +83,9 @@ class SecopStream(Stream):
                 if match:
                     cmd, ident, data = match.groups()
                     mod, _, param = ident.partition(':')
-                    key = (mod, param or 'value')
-                    cvt = self.convert.get(key)
-                    if cvt:
+                    cvt_key = self.param_info.get((mod, param or 'value'))
+                    if cvt_key:
+                        cvt, key = cvt_key
                         data = json.loads(data)
                         tags = self.tags_dict[key[0]]
                         if cmd == 'error_update':