[$] An introduction to MQTT

I was sure that somewhere there must bephysically-lightweight sensors with simple power, simple networking, anda lightweight protocol that allowed them to squirt their data down thenetwork with a minimum of overhead. So my interest was piqued when Jan-Piet Mens spoke at FLOSSUK's Spring Conference on "Small Things for Monitoring". Once he started passingworking demonstration systems around the room without interrupting thedemonstration, it was clear that MQTT was what I'd been looking for.