What is the Onion Omega 2+ and what can I do with it?

It seems that single board computers need fruit/vegetable based names, and an enigmatic word usually helps (Pi, Omega, Nano) too!

An introduction to Message Queue Telemetry Transport (MQTT)

The Internet of Things (IoT), those words will either fill you with hope or leave you in fear! But the IoT is here and many devices now communicate their information using a myriad of protocols.