MQTT Communications
MQTT is a simple messaging protocol, using very low bandwidth. It's the perfect solution for Internet-of-Things applications. MQTT makes it easy to establish communications between millions of devices and is ideal for Smart City applications.
When a publisher in the Smart City - such as a Retail Sensing people counter - has new information to distribute, it sends a message with the data to the connected "broker" or server. The broker then distributes the information to any "clients" that have subscribed to that topic, such as an app showing how busy a bus is.
