mqttjs/MQTT.js
MQTT.js
MQTT.js is a JavaScript client library and asynchronous messaging client used to connect to message brokers and exchange data via the MQTT protocol. It provides a broker interface for publishing and subscribing to topics, and includes a command-line interface for interacting with brokers without writing code.
The library supports multiple network layers, including TCP, TLS, and WebSockets, and allows for custom WebSocket construction and transport injection to handle specific headers or subprotocols. It implements bandwidth reduction through topic aliasing, which replaces repetitive topic strings with numeric identifiers.
The project covers connection management through automatic reconnection, keepalive heartbeats, and credential refreshing. It manages message reliability using pluggable in-flight storage for unacknowledged messages and ensures secure data transfer via TLS encryption with SNI and ALPN extensions. Messaging capabilities include batched subscription requests and topic name validation.
Features
- MQTT Clients - Implements a full-featured JavaScript library for connecting to MQTT brokers and exchanging data.
- Message Broker Connectivity - Provides comprehensive mechanisms for establishing secure connectivity to MQTT message brokers via multiple network layers.
- Wire Protocol Serializers - Provides wire protocol serializers that convert JavaScript objects into binary buffers according to MQTT specifications.
- Heartbeat Monitors - Implements heartbeat monitors to track connection liveness and trigger automatic reconnections.
- MQTT Messaging Integrations - Provides an integration layer for applications to exchange data with MQTT brokers via TCP, TLS, and WebSockets.
- Asynchronous Messaging Clients - Provides a full-featured asynchronous client that handles reconnections, heartbeats, and in-flight message storage.
- Publish-Subscribe Messaging - Implements the core publish-subscribe messaging pattern for exchanging data with MQTT brokers.
- Connection Reconnection Policies - Implements configurable connection reconnection policies to automatically restore dropped network links.
- Connection Keepalives - Maintains persistent network links using transport-level connection keepalives and heartbeats.
- Topic Message Listeners - Allows clients to listen for and receive incoming data from specified MQTT topics.
- Protocol-Agnostic Transport Layers - Provides a protocol-agnostic transport layer that abstracts TCP, TLS, and WebSockets into a common interface.
- Pub-Sub Messaging - Enables lightweight pub-sub messaging for communication between IoT sensors and controllers.
- In-Flight Message Storage - Offers pluggable storage backends to persist unacknowledged messages and maintain delivery guarantees during connection drops.
- Command Line Interfaces - Ships a bundled command-line interface for publishing and subscribing to messages on remote brokers.
- MQTT Command Line Tools - Includes a bundled command-line interface for publishing and subscribing to topics directly from the terminal.
- Real-Time Data Streams - Supports real-time data streams by pushing live updates to multiple clients through topic-based subscriptions.
- Topic Aliasing - Implements topic aliasing to reduce bandwidth by replacing long topic strings with numeric identifiers.
- Credential Refreshers - Includes automated credential refreshers to update authentication tokens during the reconnection process.
- Encrypted Connection Handlers - Ensures secure data transfer by managing TLS handshakes with SNI and ALPN extensions.
- In-Flight Message Persistence - Persists messages not yet acknowledged by the broker using in-memory or external pluggable storage engines.
- Machine Identity - Implements secure machine-to-machine messaging using TLS encryption and authentication tokens.
- MQTT Libraries and Brokers - MQTT client for Node.js and browser environments.
- Real Time Communication - MQTT client for Pub-sub messaging.
Star history
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