Reimagining Data Exchange: OPC UA to MQTT and OCPP Conversion for Mobile Charging Stations

Abstract

As the adoption of emission-free construction sites becomes more prevalent, the need for interoperable mobile charging stations increases. This thesis, titled ’Reimagining Data Exchange: OPC UA to MQTT and OCPP Conversion for Mobile Charging Stations,’ explores a novel approach to enabling efficient and reliable data communication between different protocols within said charging stations. Using Node-RED technology, the project creates data flows converting OPC UA data to MQTT Sparkplug B and OCPP messages, enhancing station interoperability and adaptability. The results demonstrate the system’s intended functionality, showcasing Node-RED’s capability to convert communication protocols effectively. Despite being tested solely in controlled environments, the system’s feasibility in addressing communication protocol challenges is evident. However, limitations include reliance on local testing environments and absence of testing with live systems and actual monitoring platforms, potentially impacting real-world applicability. Nevertheless, the system’s validity is asserted, offering a solution to convert communication protocol messages for mobile charging stations and their further development. Future work will focus on extensive testing with live systems, integration of other communication protocols, and automation improvements. This thesis contributes a practical and cost-effective solution, supporting the transition towards sustainable construction practices.