Category Archives: MQTT
What to do when Node-Red Flows dissapear

I wanted to install a SSD on the Windows 10 desktop that my Node-Red ran on and ended up reinstalling windows. I had exported my flows and re imported them, all good. Later on I spent a few hours adding more good stuff. Everything was fine until a few days later when after a reboot, all my flows were gone!

Talk about a mix of anger, panic, and regret. Why didn’t I back up my work!?

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Hackster MQTT Presentation and Demonstration

The August 2016 DFW Hackster MQTT meeting was a blast. Here is a link to the online presentation. https://sway.com/DpyBV3JjNYoTFrsx

If you check back on this post I will update it with related videos. I promised some people at the event to do an Arduino MQTT demo and also finish up my video on the MQTT garage door opener.

 

If you want to get started with MQTT in your own time here are some resources:

What is MQTT

 

TI LaunchPad MQTT demo.

 

Software to Download:

Download HiveMQ it is free but they will make you fill out contact information for the download link. There is lots of great info and white papers on MQTT here so stay awhile and do some reading!

You will need a MQTT test client, I suggest MQTT.FX

Here are source code samples for NodeMCU, WeMos, and TILaunchpad.

WeMosMQTT.zip

NodeMCUMQTT.zip

TILaunchpadMQTT

 

Cheers!

Custom Cortana MQTT Commands

 

image Cortana can easily be extended to aid you with your DIY home automaton projects. In this example Cortana sends MQTT commands to open and close a garage door as well as ring the doorbell with custom jingles. By the way, you don’t have to use MQTT, you can also do a whole lot of other things as well from opening a file, opening a program, or launching your favorite websites.

As of the writing of this entry I am frantically trying to finish documenting the MQTT Doorbell and Garage Door Opener devices in separate posts. Hopefully I can get those whipped out in a few days.
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