refactored Transceiver

transceiver.py

@@ -3,14 +3,17 @@ from a_backend import ABackend
 from msg.container import *
 
 class Transceiver(MsgTalker):
-	def __init__(self, backend: ABackend, name: str):
+	def __init__(self, name: str):
 		MsgTalker.__init__(self)
-		self.backend = backend
 		self.name = name
+		self.backend = None
 
 	def on_recv(self, msg: MsgContainer):
 		self.call_listener(msg)
 
+	def on_register(self, backend: ABackend):
+		self.backend = backend
+
 	def send(self, data: bytes):
 		self.backend.send(self.name, data)