Demo of IoT Control via MQTT on #RaspberryPi #piday

Kenneth Finnegan demos using a readymade MQTT app and “15 lines of Python” to turn off/on some LEDs, for future use in a tower light, or other type of multi-light indicator.




Watch the video below and read more here on Kenneth’s blog.


MQTT is essentially an Internet of Things protocol which is designed to pass single short messages between a set of devices publishing messages to a set of devices which are subscribed to that topic.

A fantastic example of where you might use MQTT is an Internet-connected light switch plus light bulbs. You would first define a topic for your room (i.e. home/livingroom/lights/ceiling) and then configure all the appropriate light bulbs to subscribe to that topic and listen for any messages published to it. You could then configure a light switch on the wall to publish “ON” when you flip it up, and “OFF” when you flip it down. Flip the switch up, it publishes the message to the MQTT broker, which forwards it to all the lightbulbs subscribed to the home/livingroom/lights/ceiling topic, which would all respond accordingly. BOOM! IoT paradise! What could possibly go wrong?!

Read more here on Kenneth’s blog.

Join 4,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Learn “How Computers Work” with Bill Gates, Ladyada and more – From Code.org !

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

Maker Business — Prototyping PCBs with Particle, a guide from a pro in the field #makerbusiness

Wearables — Learn about stretch

Electronics — Test for interference on the cheap!

Biohacking — Visualizing FLU Data with Wearables

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.