Code and documentation for the proof-of-concept (PoC) system to save real-time IoT data in Solid Pods and make use of an access control list (ACL) to make data aggregation over multiple Pods possible.
The PoC implementation is based on the network overview found below. Here, a short overview of the different components is given. Setup and implementation details are provided in the README of the corresponding subfolders.
- Sensor network: A small network of IoT sensors publishing real-time data in SenML format over the MQTT protocol. The implementation is done in an Arduino environment for the NodeMCU development board.
- RML Mapper: A node.js server instance which connects to the the MQTT broker and converts the SenML data to RDF format by means of an RML mapper, after which the data is saved to a Solid Pod.
- Solid Pod: The place where the IoT data gets stored and shared. Either a Pod provider could be used or the Pod could be self-hosted.
- Web Server: Simple web application to manage access control for the documents where the IoT data is stored.
- Data aggregator: Application or API which fetches the IoT data from all Solid Pods it has access to and combines it for use in a data platform.
- Data Platform: Any data platform where the IoT data gets used.