MQTT Protocol Support

• Full MQTT 5.0 specification compliance

• Backward compatibility with MQTT 3.1.1 and 3.1

• QoS levels 0, 1, and 2 for delivery guarantees

• Retained messages for state persistence

• Last Will and Testament for connection monitoring

• Message expiry intervals and topic aliases

Bridge Functionality

• Connect multiple MQTT brokers together

• Topic-based message routing between brokers

• Automatic reconnection after network failures

• Configurable message transformation

• Bidirectional or unidirectional bridging

• Remote broker authentication support

Security Features

• TLS/SSL encrypted connections

• Client certificate authentication

• Username/password authentication

• Access control lists (ACLs) for authorization

• IP-based access restrictions

• Anonymous access configuration options

Scalable Architecture

• Clustering capabilities for high availability

• Load balancing with multiple broker instances

• Dynamic topic trees for efficient routing

• Connection throttling for overload protection

• Configurable persistence mechanisms

• Database persistence plugin options

Integration Capabilities

• WebSockets support for browser applications

• HTTP REST API plugin for non-MQTT clients

• Extensible authentication plugin interface

• Dynamic security plugin for runtime configuration

• Database authentication plugins

• External authentication service integration

Developer-Friendly

• Clear, comprehensive documentation

• Command-line client tools for testing

• Cross-platform compatibility (Linux, Windows, macOS)

• Simple configuration file syntax

• Well-documented source code

• Active community support

IoT Optimizations

• Designed for large numbers of connected devices

• Efficient handling of frequent reconnections

• Support for constrained networks with high latency

• Minimal protocol overhead

• Offline message queueing

• Support for shared subscriptions