Crossbar test router configuration is available in .crossbar directory. Starting command: crossbar start This project contains wamp client config to be loaded at runtime startup. project_files/wampconf.json wampconf.json is in "Project Files", so it is copied to runtime's working directory, and then loaded after program transfer + runtime restart. Otherwise, wamp config file path can be forced : ./Beremiz_service.py -c /path/to/my/wampconf.json /working/dir Otherwise, path for CRA secret can be forced : ./Beremiz_service.py -s /path/to/my/secret /working/dir Tested on version: Crossbar.io : 17.12.1 (Crossbar.io COMMUNITY) Autobahn : 17.10.1 (with JSON, MessagePack, CBOR, UBJSON) Twisted : 17.9.0-EPollReactor LMDB : 0.93/lmdb-0.9.18 Python : 2.7.12/CPython