Understanding MQTT: How Smart Home Devices Communicate

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[palblinker]

As a newish parent. I'm so happy you used cleaning up your room as an example.

[skepsmart]

I'm very much a n00b to IoT and all of this - for about a year now. I've seen tons of videos and I just stumbled onto yours channel accidentally today somehow - no idea how it took a year, but I want to thank you! The level of detail, but simplicity in how you explain things is excellent! Super easy to understand and follow! Keep it up and thank you!

[shanesams]

You can definitely tell that you're a teacher by the way your set your videos up and talk. Its awesome

[ardentdfender]

I work as a Field Process & Automations Control Engineer for a OEM in the industrial Industry. While IT people deal with the company corporate network systems, we deal in OT in the Operations Systems in the industrial & manufacturing space. And only recently I started getting into learning about OPC and MQTT Protocols. As this relate not to just IoT but IIoT for the entire Industrial sector and getting raw data from the PLC and Automation Control Systems and Networks from the device into the cloud so that information can be stored to later apply Analytics, Metrics and all kind of spreadsheet analysis. That’s a massive amount of data locked in the PLC and being compiled ever single sec 24/7 all year long and when system is in operation. So figuring out how to get that all that data involving a protocol like MQTT that is very lightweight is now coming into play with what I’m doing in industrial Automations and industry 4.0 initiatives. It’s damn exciting times.

[JeffreyHammerCam]

YES! More videos like this one, I like the complete explanation of some of these features, I didn't understand the QoS until you spelled it out! I've been looking for MQTT for dummies so I could get my knowledge up to par, thanks again!!

[patrickniemeyer]

Great video - I can't believe it's taken me this long to find this one. Support this guy's patreon.

[squalazzo]

best explanation found, so far... i knew most of this stuff, but you made it easy for everyone to understand :)
about tasmota, you can choose between 3 different MQTT libraries (the prebuilt binary firmwares use the 1st one, with smaller memory footprint)... i had issues with a remote mqtt broker unaccessible if i had no internet at home... my sonoffs started going crazy... then someone pointed me at this, look at my next comment (anti-youtube link protection)...

[seshukumar]

you have nice and simple way of explaining things! Thank you.

[andrewbeasley]

For a noob just starting MQTT this was great - thank you for making this vid.

[ViciousXUSMC]

Good video, the part that is most unknown to me is what you started to get into at the end. The MQTT naming and subscription/status. I would like if you had gone into more detail on the possible wildcards, use cases, etc. Perhaps a different video just expanding on that little bit further?

[Trains-With-Shane]

That LWT function is pretty cool. We use that in telecom as well sometimes. They call it a "dying gasp" it's a little more direct than letting a server discover that a device is missing like the LWT does. It actually notices that device lost power and with what is left in the capacitors sends an alert to the management system. It's quicker, but if for some reason that message doesn't get sent the system will still notice the device hasn't checked in and sends a message similar to LWT. Something to the effect of "device went missing" or some such. Anyways not relevant to the topic I just thought LWT was worthy.

[adifoto]

Thanks for a good video. Keep them coming.

[CozySleepingCouch]

The video I have been waiting for...👍👍👍
Cant wait to see it, thanks a lot for making it 😎

[michaeldominguez]

3:25 This is the first time he blinks this video....

[ariwijaya]

Awesome video. Nice explanation and i finally begin to understand how to use the MQTT
Thank you very much!!!

[georgewashington]

Great video, keep publishing more. 2 Questions: 1-Am I correct in assuming that; the only reason to install MQTT on Home Assistant is the poor reliability of Sonoff devices? 2-Once the Mosquitto is active, does it automatically take over from Home Assistant to control the devices? Thanks

[scienceoftheuniverse]

Does a local nodered subscribe to topic on the cloud broker?
Provided that the local nodered is connected to the router

[VAKUL-DC]

Awesome tutorials...now retain and qos makes sense..been thinking of looking it up...thanks to you know i know

[gerardschepers]

Great video. It taught me more about QoS and Retain. But my suggestion for another video would be what I can best use. E.g. all systems balance on the triangle fast, quality and price. For a MQTT setup that translates to something like response-time, reliability, bandwidth usage. (the latter may look like a no-brainer, but what if a device needs to connect to a LORA network) . I would be interested in a video explaining when using high/low QoS, the retain flag, LWT versus having a low bandwidth, or a low reliable network. Also I understand the concept of a LWT but have never seen an implementation using it. E.g. my sonoffs nicely publish a "tele/sonoff01/LWT Online" but what should happen when I brutally kill the sonoff by pulling the plug. Thank you - Fritz

[hillmakeitbetter]

Great stuff, I appreciate your work. This subject can get deep very quick. I installed a Shelly 2.5 and just got Hass.io running on a Pi. I also just added Mosquitto broker to HA. I'm not sure what to do next. Do you have a video that explains next steps to get the Shelly connected to HA? Step by Step? I'm new to this. TIA