This tutorial explains the common databus payload format and shows an example how to create a custom connector out of it.
The Industrial Edge Common Databus Payload Format defines how connectors should publish data to the IE Databus via MQTT. Connectors that fulfill this specification can then reuse the existing functionality of Industrial Edge apps in the Industrial Edge Ecosystem.
The official documentation can be found here under chapter "General Common Payload Format":
Industrial Edge Common Databus Payload Format
The first section explains the structure of the Common Databus Payload Format. Here all possible operations and the dedicated topics are listed. Furthermore the responding messages are explained.
The second section shows an example of a custom connector using this format. Here we use a simple docker app "Custom Connector App", that acts as custom connector and provides some data. The data is published to the IE Databus via MQTT and can be then used by further apps. In this case we use the IE Flow Creator to read out the data and write some data back to the custom connector.
- Access to an Industrial Edge Management (IEM)
- Onboarded Industial Edge Device (IED) on IEM
- IEM: Installed system configurator for Databus
- IED: Installed system app Databus
- IED: Installed app Flow Creator
- Linux VM with docker and docker-compose installed
- Installed Industrial Edge App Publisher
- HTML5-capable Internet browser (in general it is advised to use Chrome, for Linux based systems it is recommended to use Firefox)
- Industrial Edge Management OS V1.5.2-4
- Databus Configurator V2.1.0-3
- Industrial Edge Management App V1.13.10
- Databus V 2.1.0-4
- Flow Creator V1.15.0-2
- Industrial Edge Device V 1.12.0-10
- Industrial Edge App Publisher V1.11.5
- Docker Engine V24.0.5
- Docker Compose V1.29.2
You can find a detailed description of the Common Databus Payload Format here:
To successfully run the example app "Custom Connector App", you need to follow these steps:
- Build application
- Upload application to the Industrial Edge Management
- Create configuration for the application
- Install the application
- Test the application
You can find further documentation and help in the following links:
- Industrial Edge Hub
- Industrial Edge Forum
- Industrial Edge landing page
- Industrial Edge GitHub page
- Industrial Edge Common Databus Payload Format
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