Flexmeter Hyllie metering platform
Built the backend and integration architecture for the Flexmeter EU-project test site in Hyllie, evaluating Connode 6LoWPAN IP mesh metering with more than 300 meters.
The problem
The Flexmeter test site in Hyllie evaluated Connode 6LoWPAN IP mesh technology with a high sampling rate to stress the mesh network.
What Henrik owned
Henrik developed the Django and Cassandra backend, connected substation meters through local Raspberry Pi edge devices, led two other developers and built the SAP integration for E.ON billing flows.
Work delivered
- Developed a Django backend for more than 300 connected meters
- Stored high-frequency meter data in a Cassandra NoSQL database
- Tested metering at a very high sampling rate to stress the 6LoWPAN mesh network
- Connected substation meters via DLMS/COSEM and ANSI C12.18 using local Raspberry Pi edge devices
- Led two developers building supporting services in .NET Core and a frontend in Angular
- Integrated meter values with SAP so the meters could run as billing meters in E.ON’s normal business flows
Technical approach
The architecture combined mesh-connected meters, edge devices for substation meter protocols, a Cassandra-backed Django API, RabbitMQ messaging, supporting .NET Core services, an Angular frontend and SAP export for billing.
Where it stands
The Hyllie test site ran with more than 300 connected meters, high-frequency sampling, backend services, frontend tooling and SAP integration for normal billing flows.