Problem with MQTT Client

[ArunRuchir]

I have gone through all possible topics on this forum for MQTT configuration and have configured the MQTT client exactly as per that. Using the latest 6.0 MQTT drivers and they are visible in the driver list.

Unfortunately, I am not getting any data on the input side (Subscription). Neither I am able to send any data (Publish).

Some configuration details are
– MQTT client
– DrvDsMQTT is visible as an MQTT data driver but not getting used
– 2 channels configured for the subscription
– 1 channel configured for publishing.
Driver: DrvMqttClient 6.0.0.1
Status: Undefined
Session time : undefined
Command time : Undefined
Session (total/errors) : 0/0
request (total/errors) : 0/0
Current data – Value – —

Please help.

• This topic was modified 11 months, 2 weeks ago by Mikhail.

[Mikhail]

Hello,

To get data from MQTT broker, you need DrvMqttClient driver.
Could you provide links to the screenshots of the project settings and communication line log?

[ArunRuchir]

Hi,

While DrvMqttclient is available in the Driver list, it’s not getting defined in data sources.
Please help.

MQTT Problem Screen shots

Thanks.

[Mikhail]

Hi,

A screenshot of communication line log is missed. On the page “Line 4 Stats”, select “Line Log”.

[ArunRuchir]

Hi,

Updated file with screenshot enclosed.

Regards
Arun
https://docs.google.com/presentation/d/1u9MJDspx_sv5EgmsYYDnEz6tExtMvluq/edit?usp=sharing&ouid=109046646427669848489&rtpof=true&sd=true

[Mikhail]

Hi,
After the connection is established successfully, you will get new data when topics change, and the device status will change to normal. New data will be written in communication line log.

[ArunRuchir]

Dear Mikhail,
As per your response, I believe my configuration is OK, but I am still not getting any MQTT message.

To test the same, I did following
– Rapidscada server is running on my Laptop
– On the same Laptop, I created an MQTT Broker using MQTT Explorer. It got connected on 127.0.0.1
– I am also running MQTT-Fx and connecting to this broker.
– Now my devices are ArunM1- subscribing to topic TestM1
and ArunM2 subscribing to topic TestM2.

When I publish a value on TestM1 or TestM2 topic using MQTT Explorer, I am able to subscribe and see these values in MQTT-fx but not coming in Rapidscada.

Screenshots are enclosed. Can you please help?
https://docs.google.com/presentation/d/1u9MJDspx_sv5EgmsYYDnEz6tExtMvluq/edit?usp=sharing&ouid=109046646427669848489&rtpof=true&sd=true

[Mikhail]

Hello,

Could you add a screenshots of Device 4 Properties – Options?
If you try the same on public broker broker.mqtt-dashboard.com, does it work or not?

[ArunRuchir]

Device 4 Properties — Options screen shots enclosed.

https://docs.google.com/presentation/d/1u9MJDspx_sv5EgmsYYDnEz6tExtMvluq/edit?usp=sharing&ouid=109046646427669848489&rtpof=true&sd=true

Regards
Arun

[Mikhail]

Can’t find a screenshot where the Options node is selected.

[ArunRuchir]

Please refer to slide nos 6 of my recent deck. I suppose I had shared it earlier.

If I am still missing, pls share any reference screen shot and I will reshare that part.

Thanks for your help. I am really looking forward to a solution to this.

Regards
Arun

[Mikhail]

https://ibb.co/yPZZWqP

I suggest trying broker.mqtt-dashboard.com for testing.

[ArunRuchir]

Thanks, Mikhail,
It’s working now. The only problem was the Root topic. Once I deleted that, MQTT communication started.

Thanks and regards
Arun

[ArunRuchir]

Hi Mikhail,

Can you please help me with the Command code for MQTT command? I think I am making some mistakes and it’s all going into error.

Invalid Command

[Mikhail]

Hi,

I recommend use the same Tag Code and Topic parameters.
You don’t need to create commands under the Command node.
If a subscription is created and not read only, a value can be published.

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