KNX to MQTT protocol converter for building automation and IoT integration

How do industrial KNX to MQTT converters work?

KNX is a communication protocol widely used in industrial automation, primarily in building automation systems, for communication with HVAC, heating, lighting, shading, access control and security systems. MQTT is a lightweight machine-to-machine communication protocol based on the publish/subscribe model and operating through a central message broker.

A KNX to MQTT protocol converter enables bidirectional data exchange between the KNX bus and MQTT-based systems. This means that data from KNX devices can be published to an MQTT broker, while MQTT messages can be used to control KNX devices in real time. MQTT communication can be secured using TLS/SSL encryption, ensuring a high level of data transmission security.

Industrial KNX to MQTT converters

Every KNX to MQTT converter available in our offer is designed for DIN-rail mounting, resistant to electromagnetic interference and suitable for operation in environments with a wide temperature range from –40°C to +85°C. These converters can be installed in control cabinets as well as in distributed and industrial installations.

Our KNX to MQTT protocol converters support standard KNX interfaces, Ethernet connectivity and, depending on the model, RS-485 interfaces. This allows seamless integration with BMS, SCADA systems, IoT platforms and cloud-based solutions. Thanks to free configuration software supplied with each device, setup and commissioning are fast and straightforward.

How to connect KNX and MQTT networks?

The connection between the KNX bus and an MQTT infrastructure is established using an industrial KNX to MQTT converter acting as an intelligent communication bridge. The device connects locally to the KNX bus, while communication with the MQTT broker is handled via Ethernet (LAN or VPN).

This approach preserves the stability and reliability of the KNX bus, while enabling data access from supervisory systems, web applications, analytics platforms and IoT environments. KNX–MQTT integration is particularly common in Smart Building projects and industrial systems requiring remote monitoring and control.

How to configure a KNX to MQTT converter?

Configuration of a KNX to MQTT protocol converter is performed using dedicated manufacturer software or a web-based interface. The configuration process does not require any changes to the existing KNX application logic, which significantly simplifies deployment.

During configuration, the following parameters are typically defined: mapping KNX group addresses to MQTT topics, data flow direction (KNX → MQTT or MQTT → KNX), data formats and connection parameters for the MQTT broker. This allows the converter to be precisely tailored to the specific application and system requirements.

Why use KNX to MQTT converters?

Using KNX to MQTT converters enables gradual modernization of building automation systems without replacing existing infrastructure. It is a flexible, scalable and future-proof solution that connects traditional KNX installations with modern IoT platforms and data management systems.

Select the KNX to MQTT converter that best matches your application requirements and review the detailed technical specifications of the available models below.