en BACnet

MQTT to BACnet Converters – industrial gateways for IoT and BMS integration

An MQTT to BACnet Converter is a professional communication gateway that allows seamless data exchange between BACnet IP or BACnet MSTP networks and modern IoT platforms using MQTT protocol. These devices are widely used in industrial automation and building management systems (BMS) to connect traditional field devices such as HVAC controllers, sensors, or energy meters with cloud-based services, analytics tools, and IoT dashboards.

The converters ensure bidirectional communication, meaning they can both publish data from BACnet slave devices into an MQTT broker and receive commands from IoT applications to be executed by BACnet Master systems. With support for TLS/SSL encryption, all communication remains secure and compliant with modern cybersecurity standards, making these gateways suitable for critical infrastructure and Industry 4.0 applications.

Typical use cases for MQTT to BACnet Converters include:

• HVAC systems – integration of air handling units, chillers, VRF/VRV systems, and heat pumps with cloud platforms.
• Energy management – publishing real-time consumption data from electricity, gas, or water meters to MQTT servers.
• Lighting control – remote monitoring and control of BACnet-based lighting systems through IoT dashboards.
• SCADA and BMS systems – enabling legacy automation to communicate with smart platforms.
• Smart City infrastructure – collecting distributed BACnet data and centralizing it for urban management systems.

The product range includes models supporting both BACnet IP (RJ45 Ethernet) and BACnet MSTP (RS-485). For BACnet MSTP, data rates are supported up to 115200 bps, while Ethernet communication for MQTT and BACnet IP operates at 10/100 Base-T with autosensing. These features ensure stable, reliable, and high-performance data transmission. The compact design (60 x 36 x 95 mm) and low weight (~200 g) make installation easy in electrical cabinets, while the DIN rail mounting guarantees compatibility with industrial standards.

All converters in this category, such as the HD67937 and HD67938 series, come with free configuration tools (SW67937 / SW67938). These software packages allow engineers to easily map BACnet objects to MQTT topics, configure transmission parameters, and enable security features like TLS/SSL encryption. The intuitive interface minimizes setup time and reduces configuration errors, making these gateways ideal for fast deployment in both small- and large-scale automation projects.

Key advantages of MQTT to BACnet Converters:

• Bidirectional communication between BACnet and MQTT networks.
• Secure data transfer with TLS/SSL encryption.
• Flexible power supply options: 8…24VAC or 12…35VDC.
• Extended operating temperature range: -40°C to +85°C.
• Easy configuration using SW67937 / SW67938 software.
• Compact industrial design with DIN rail mounting.

With these converters, system integrators and building automation companies can bridge the gap between traditional BACnet infrastructures and modern IoT applications. The devices are suitable for small office buildings, large industrial facilities, and even smart city projects. They support remote monitoring, predictive maintenance, and integration with cloud-based analytics tools, ensuring maximum flexibility for future-proof automation solutions.

If you want to learn more about MQTT to BACnet integration and choose the right converter for your project, contact our expert here: Contact Consteel Electronics Expert.