MQTT and Node.js Messaging the Internet of Things
summary
MQTT is a tiny binary pub/sub protocol with three QoS levels and an offline persistent session that uses a client id and clean flag so missed messages arrive on reconnect. The Node ecosystem shows mqtt.js on npm, a browser build via WebSockets and browserify, and an embeddable Mosca broker backed by LevelDB through levelup. A benchmark opens 5,000 connections to a broker and measures latencies roughly 3–350 ms with Node implementations competitive versus C++ mosquitto. A live demo toggles an LED via Twitter and iMessage and mentions Pony and CoAP bridges.
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chapters (17)
- 0:00Introduction
- 1:40How do we call it
- 1:58Battery
- 3:10MQTT
- 3:39What is MQTT
- 4:08MQTT features
- 4:59MQTT code
- 5:18Instant gratification
- 5:40Mosquito
- 6:25Why MQTT
- 6:55MQTT Broker
- 8:04Latency
- 8:35Offline Mode
- 10:18Publish
- 11:21Conclusion
- 12:33Future projects
- 13:20Demonstration
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