Understanding The MQTT Protocol Packet Structure

www.steves-internet-guide.com/... -In this video we take a more detailed look at the MQTT protocol packet structure and examine the various fields.
You will learn about the MQTT control headers and responses and how MQTT messages or packets are formatted.
We take a look at the packet details using a modified Python client to print out the control header details.
Note: there is an error in the video at around 4 mins it shows 9 bits it should only be 8
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[@philwilkinson7228]

steve, could you record your next video at a slightly higher volume. Thanks

[@haroldhoyos3583]

Hi, do you know how i can make a benchmark to the MQTT broker? I want to simulate certain amount of connections and measure the times they take to connect, subscribe and publish, with and without SSL. Thanks.

[@stevecope]

Hi
I have a couple of python scripts that I'm working on that you can use. Contact me using the ask steve page on the website

[@emddom]

I liked this video a lot (and the others, as well).
However, around 4:00 there is an extra 0 to the right of the 1 (i.e. you have a 9-bit byte :) ),
this would be dec 128

[@stevecope]

Hi
Thank you for the feedback I will try to add a comment to the video to point it out
Rgds
Steve

[@SandeepSolankis]

Can you please elaborate on how the Payload is structure in CONNECT packet?

[@stevecope]

Hi
Did you read the tutorial on the site
www.steves-internet-guide.com/mqtt-protocol-messages-overview/
if you still have questions then please use the comment box on the site.
rgds
steve

[@SandeepSolankis]

Thanks for the response. I did read this link before watching the video. I understood that there are 2 bytes reserved for the client id length. I am currently trying to connect to a MQTT broker via SIM800L module. When i send a CONNECT packet, i don't recieve a proper CONNECTACK. If you want to help me, i can share further details. Thanks

[@muradzaman4571]

Hey steve can you please tell me how can i connect mqtt server in packet tracer?

[@stevecope]

Hi
Not sure what you mean can you explain more
rgds
steve

[@muradzaman4571]

I want to add mqtt protocol in my packet tracer simulation software.How can i do that?

[@stevecope]

@@muradzaman4571 Hi Sorry but It's not something I've done