MQTT (Message Queuing Telemetry Transport) is a lightweight, open protocol for transmitting data – specifically designed for use in IoT and IIoT environments. A DataLine IO-Link master can send sensor data directly via MQTT to a higher-level system (e.g., a cloud platform, an edge device, or a dashboard) – without the need for a PLC. Direct connection to cloud systems such as AWS, Azure, or local brokers Minimal data traffic – ideal for large systems or remote locations Push principle: only new or changed data is transmitted

What is a REST API with JSON?

REST (Representational State Transfer) is a web standard that allows data to be retrieved via HTTP – just like a normal website visit. The DataLine IO-Link master provides a REST API through which external systems (e.g., SCADA, ERP, dashboards) can retrieve specific information. The data is provided in JSON (JavaScript Object Notation) format – an easy-to-read standard format for structured data. Easy query of current sensor data via URL No additional converter or gateway required Integration into common IT systems possible with just a few lines of code

Product selection DataLine

The DataLine IO-Link masters (AL13 series) were specially developed for applications that focus on data acquisition, IT integration, and future-proofing.

The smart solution for data integration and IIoT

Thanks to their sophisticated features, they not only enable the easy connection of IO-Link sensors with 4 or 8 A ports, but also offer a powerful IIoT interface with MQTT/JSON – perfect for transmitting sensor data to higher-level systems and cloud platforms.

With their robust IP67 or IP69K design, they are suitable for both industrial environments and applications with cleaning processes. The compact design and the M12 A-coded power connection enable quick and secure integration – without any major installation effort.

System overview

DataLine benefits

Direct IT connection via MQTT/JSON
For easy integration into cloud or edge systems – without a gateway or PLC.

Greater transparency through real-time data access
Access to sensor data in parallel with PLC communication – ideal for condition monitoring, OEE, or quality assurance