I have made some progress on accessing Schneider Electric devices through their Conext ComBox. I have been able to set up an Arduino Uno with Wiznet 5100 Ethernet shield, and utilizing the ArduinoModbus library have been able to query Modbus registers from the SE devices. It is all very simplistic right now, but I am confident that I have all the technical pieces to access any SE device via Modbus over TCP/IP, and feed it to any network service. My next step is to create a simple service running on the Arduino that will query SE devices and produce JSON output.
I have also made some progress on my emonCMS installation. It is taking longer that expected to build out a new set of servers which was already in process. I had planned to run emonCMS on one of the new servers, this should move along faster in the next couple weeks.