MQTT to CAN Converters – industrial gateways for IoT and automation

Industrial MQTT to CAN Converters – reliable integration solutions

An MQTT to CAN converter is a professional gateway designed to connect MQTT-based IoT systems with CAN and CANopen networks. This integration enables real-time data exchange between industrial field devices and cloud platforms. By using such converters, engineers gain the ability to publish and receive CAN data via MQTT brokers, bridging traditional automation systems with modern IoT infrastructures. These converters provide reliable connectivity, simplified integration, and compliance with industrial standards.

The converters of this category are widely used in industrial automation, building management systems (BMS), HVAC applications, and in transportation systems where CAN is a standard communication protocol. Thanks to TLS/SSL encrypted communication, data transmission is not only stable but also secure, meeting cybersecurity requirements for IoT applications. Models such as HD67939-B2 (CAN ↔ MQTT) and HD67940-B2 (CANopen ↔ MQTT) provide flexible integration options and are easy to configure with free software.

Why use an MQTT to CAN converter?

The main advantage of using an MQTT to CAN converter is the ability to extend traditional CAN infrastructures into the world of IoT and cloud-based systems. MQTT is a lightweight and widely adopted protocol optimized for remote monitoring and telemetry, making it the perfect bridge between CAN devices and modern data platforms. With these converters you can achieve:

• Remote monitoring of CAN and CANopen devices from any location.
• Secure communication with TLS/SSL encryption for MQTT connections.
• Cost optimization by reducing the need for dedicated SCADA systems for CAN networks.
• Seamless integration with IoT platforms, cloud analytics, and BMS systems.
• Easy setup with free configuration tools (e.g., SW67939, SW67940).

Key technical features

Every MQTT ↔ CAN converter is designed with robust industrial requirements in mind. Typical technical specifications include:

• Communication ports: 1x Ethernet RJ45, 1x CAN or CANopen.
• CAN protocol: CAN 2.0A / 2.0B or CANopen depending on model.
• CAN data rate: up to 1 Mbps.
• MQTT: 10/100 Base-T with autosensing.
• Power supply: 8...24VAC or 12...35VDC.
• Operating temperature: -40°C to +85°C.
• Mounting: DIN rail, industrial type B housing.
• Configuration software: free software included with each device.

Application fields

Thanks to their versatility and durability, MQTT to CAN converters are suitable for a wide range of industries and applications. The most common use cases include:

• Automotive industry: remote diagnostics and monitoring of CAN bus in vehicles.
• Building automation: integration of HVAC and BMS with IoT platforms.
• Energy sector: monitoring of critical infrastructure with MQTT.
• Public transport: connecting CANopen systems in buses, trains, and trams with IoT servers.
• Heavy industry: data exchange between CAN-based machines and cloud analytics platforms.

Choosing the right MQTT to CAN converter ensures reliable communication, strong cybersecurity, and smooth integration with IoT and industrial automation systems. Devices such as HD67939-B2 and HD67940-B2 offer powerful features, wide operating temperature range, and a 24-month manufacturer’s warranty. These converters make CAN-based infrastructures fully compatible with modern IoT architectures, enabling data-driven decision making and remote supervision.