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Author Topic: MQQT  (Read 11310 times)

icauto

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MQQT
« on: October 31, 2020, 10:34:55 PM »
Hello,

I am setting up an MQTT setup. I seem to get a fail at the point of TLS handshake. I tried a different MQTT broker and I am getting the same thing.

Here is a screen shot of the DMLOGGER Dump.




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Controls Guy

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Re: MQQT
« Reply #1 on: November 01, 2020, 09:48:00 AM »
What's your scan time?   For Gmail, I found that the process requires about 1.85 to 1.90 seconds of CPU time, and with the login timing out on Google's end after about 9 seconds, that means you must dedicate at least 21% of CPU time to logging in or it will time out.  Email has a 1666 us/scan timeslice, so I have to have a scan time below 6.2ms (when not logging in)  to log in.   I don't know if MQTT has a similar timeslice number, or it might even be the same one, but try again with a program that has nothing in it but the MQTT.  Then increase the scan time gradually and see it that makes it fail at some point.
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BobO

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Re: MQQT
« Reply #2 on: November 01, 2020, 08:09:15 PM »
The connection is being dropped in less than a second. Don't know why that would be, but there is almost no chance that the handshake would be completed that quick.
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icauto

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Re: MQQT
« Reply #3 on: November 02, 2020, 08:36:03 AM »
Seeing as I am getting  it on 2 brokers, I believe it is on my side. Do I have to open any ports on the router or anything adjusted on my side?
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BobO

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Re: MQQT
« Reply #4 on: November 02, 2020, 09:23:22 AM »
Quote from: icauto on November 02, 2020, 08:36:03 AM
Seeing as I am getting  it on 2 brokers, I believe it is on my side. Do I have to open any ports on the router or anything adjusted on my side?

You wouldn't get to the handshake if that were a problem.

Are the brokers public? We can try to test them from here.
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"It has recently come to our attention that users spend 95% of their time using 5% of the available features. That might be relevant." -BobO

icauto

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Re: MQQT
« Reply #5 on: November 02, 2020, 11:12:09 AM »
Hello,

We tried:

io.adafruit.com

www.maqiatto.com

Thanks
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BobO

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Re: MQQT
« Reply #6 on: November 02, 2020, 11:42:13 AM »
I tried io.adafruit.com and it worked fine. It did kick me when I had the login wrong, but once I used the generated I/O key it connected. I then had to get the topic format correct, but once fixing that I was able to see my data on the dashboard.

The AdaFruit I/O system is pretty slick. I hadn't seen that before. Looks like in addition to MQTT you can use an HTTP REST API to access it.
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"It has recently come to our attention that users spend 95% of their time using 5% of the available features. That might be relevant." -BobO

icauto

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Re: MQQT
« Reply #7 on: November 02, 2020, 12:34:46 PM »
I do have the generated I\O key from adafruit. I went to device manager. Where do I put it in?
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BobO

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Re: MQQT
« Reply #8 on: November 02, 2020, 02:54:48 PM »
Quote from: icauto on November 02, 2020, 12:34:46 PM
I do have the generated I\O key from adafruit. I went to device manager. Where do I put it in?

The I/O key is used as the password in the MQTT device config.
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"It has recently come to our attention that users spend 95% of their time using 5% of the available features. That might be relevant." -BobO

Ssweber

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Re: MQQT
« Reply #9 on: November 02, 2020, 08:09:18 PM »
Quote from: BobO on November 02, 2020, 11:42:13 AM
The AdaFruit I/O system is pretty slick. I hadn't seen that before. Looks like in addition to MQTT you can use an HTTP REST API to access it.

I?m about to try out Thingsboard.io - there?s a whole world of iot dashboards I?m just finding. I?ll post back once I try it out.
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