diff -r 41fc23fd21c4 -r 361366b891ca svghmi/svghmi_server.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/svghmi/svghmi_server.py	Wed Sep 11 12:24:30 2019 +0200
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# This file is part of Beremiz
+# Copyright (C) 2019: Edouard TISSERANT
+# See COPYING file for copyrights details.
+
+from __future__ import absolute_import
+
+from twisted.web.server import Site
+from twisted.web.resource import Resource
+from twisted.internet import reactor
+from twisted.web.static import File
+
+from autobahn.twisted.websocket import WebSocketServerFactory, WebSocketServerProtocol
+from autobahn.twisted.resource import  WebSocketResource
+
+# TODO session list lock
+svghmi_sessions = []
+
+class HMISession(object):
+    def __init__(self, protocol_instance):
+        global svghmi_sessions
+        svghmi_sessions.append(self)
+
+        # TODO multiclient :
+        # get a unique bit index amont other svghmi_sessions,
+        # so that we can match flags passed by C->python callback
+    
+    def __del__(self):
+        global svghmi_sessions
+        svghmi_sessions.remove(self)
+
+    def onMessage():
+        # TODO :  pass it to the C side recieve_message()
+        #    update HMITree
+        #        - values
+        #        - refresh rates / subsriptions
+
+        # TODO multiclient : pass client index as well
+        pass
+         
+
+class HMIProtocol(WebSocketServerProtocol):
+
+    def __init__(self, *args, **kwargs):
+        self._hmi_session = None
+        WebSocketServerProtocol.__init__(self, *args, **kwargs)
+
+    def onOpen(self):
+        self._hmi_session = HMISession(self)
+        print "open"
+
+    def onClose(self, wasClean, code, reason):
+        del self._hmi_session
+        self._hmi_session = None
+        print "close"
+
+    def onMessage(self, msg, isBinary):
+        self._hmi_session.onMessage(msg)
+        print msg
+        #self.sendMessage(msg, binary)
+     
+svghmi_root = None
+svghmi_listener = None
+
+# Called by PLCObject at start
+def _runtime_svghmi0_start():
+    global svghmi_listener, svghmi_root
+
+    svghmi_root = Resource()
+
+    wsfactory = WebSocketServerFactory()
+    wsfactory.protocol = HMIProtocol
+
+    # svghmi_root.putChild("",File(".svg"))
+    svghmi_root.putChild("ws",WebSocketResource(wsfactory))
+
+    sitefactory = Site(svghmi_root)
+
+    svghmi_listener = reactor.listenTCP(8008, sitefactory)
+
+    # TODO
+    # start a thread that call the C part of SVGHMI
+
+
+# Called by PLCObject at stop
+def _runtime_svghmi0_stop():
+    global svghmi_listener
+    svghmi_listener.stopListening