node-red has a cool Control Panel Module you can use to build a Real Time Dashboard for your MQTT sensor data.

Publishing Real Time data on the internet can be done in several ways.

IoT as the use of network-connected devices, embedded in the physical environment, to improve some existing process or to enable a new scenario not previously possible.

These devices, or things, connect to the network to provide information they gather from the environment through sensors, or to allow other systems to reach out and act on the world through actuators.

Devices, Gateways and Clouds

They're Everywhere.

Wireless Sensor Networks are being offered as products.

Kits of Sensors and Smart Gateways are available off the shelf.

As packaged systems and do it yourself modular pieces.

Monit offers wireless sensors with a 5 year battery life for $50.

Gjermund Bjaanes  designed a generic MQTT Aggregator to gather published data

and publish it on a web page.

It provides a bridge between an MQTT Message Broker like Mosquito

and Web Sockets to get a side door into web browsers for feeding in live data.

Michael Dawson from IBM is interested in IoT.

He developed an alarm system using MQTT as the messaging bus.

He has integrated 3~4$ wireless sensors into the system as well as a camera to shoot images when desired

His video describes the whole system.

The software for the different projects is provided as well as schematics and gerber files for an RF interface.

Mosquitto

Its a message broker.

MQTT is a machine-to-machine (M2M)/"Internet of Things" connectivity protocol. It was designed as an extremely lightweight publish/subscribe messaging transport. It is useful for connections with remote locations where a small code footprint is required and/or network bandwidth is at a premium. For example, it has been used in sensors communicating to a broker via satellite link, over occasional dial-up connections with healthcare providers, and in a range of home automation and small device scenarios.