Use ip:port from CLI.

oi-sensor/oi-sensor.py

@@ -40,7 +40,7 @@ async def main():
     # setup our server
     server = Server()
     await server.init()
-    server.set_endpoint("opc.tcp://%s:%s/freeopcua/server/" %(ipv4, port))
+    server.set_endpoint("opc.tcp://%s:%s/oi-sensor" %(ipv4, port))
 
     # set up our own namespace, not really necessary but should as spec
     uri = "http://examples.freeopcua.github.io"