Domoticz/out on mqtt plugin

[jarmoboy]

Hello,
I have find out that when my device gets command from tasmota device, it changes state in domoticz, but there is no info about it on domoticz/out. It has to wait till tasmota reports state in set interval to refer it on domoticz/out. Is it feature or bug? I had on mind that when whatever changes its state is automatically reported on domoticz/out.
Thanks for info

[FireWizard]

Hello, @jarmoboy,

You wrote:

I have find out that when my device gets command from tasmota device, it changes state in domoticz, but there is no info about it on domoticz/out.
Is it feature or bug?

It is a feature.

Your Tasmota device sends its command to domoticz/in by MQTT.

By default the setting for "Prevent Loop" is "true" (See your MQTT configuration in Domoticz hardware)
This means that received MQTT messages are not re-transmitted to MQTT.

You can change that by changing the setting "Prevent Loop" to "false".

Screenshot_MQTT loop.png (29.8 KiB) Viewed 1654 times

Regards

[jarmoboy]

Hello @FireWizard,
Thanks for reply. Thats exactly what i wanted. Its not good that this options for plugin arent described in such manual or i havent found it.
I am also wondering about of what kind of " LOOP" it can make. (just to avoid it)
Thanks
Jarmo

[waltervl]

Hello @FireWizard,
Thanks for reply. Thats exactly what i wanted. Its not good that this options for plugin arent described in such manual or i havent found it.
I am also wondering about of what kind of " LOOP" it can make. (just to avoid it)
Thanks
Jarmo

This is why:
viewtopic.php?t=12632
viewtopic.php?t=17193

I will update the wiki as the help text at the screenshot is not helping enough

[FireWizard]

Hello @ jarmoboy

MQTT is a publish/subscribe structure.

In this case a client publishes a particular value, under a specific topic name, to a server (broker). Another client can, at the time it wishes, subscribe to that topic and as a result it receives the value.

See below (credits to https://mqtt.org/)

Screenshot_MQTT_structure.png (93.7 KiB) Viewed 1615 times

If the receiving client (Orange at the right side) also republish that value, it may lead to undesirable results.

You do not want to know, how often I had to use the "Filter" node (previous called RBE node) in Node Red in order to block the unwanted messages.
I was very happy, when this option was introduced.

The principle of MQTT is, that one party publish the data en that other (multiple) parties subscribe to that data.

I hope this explains briefly your question:

I am also wondering about of what kind of " LOOP" it can make. (just to avoid it)

Regards

[jarmoboy]

I agree. The text, that this is a bad scenario and should be avoided doesnt say any explanation or help how to understand it. Maybe to explained, that echoed back means: Domoticz/IN MQTT messages will be responsivly reported on Domoticz/OUT as reaction.

[waltervl]

Mqtt wiki page is modified.

[Vomera]

Hi all!

In the hardware tab > Mqtt i want to set , prevent loop to false, but it doesnt save the setting. If i refresh the mqtt settings its back to TRUE



I removed the MQTT settings and added the plugin again, but after set it to false, it doesnt save the setting.

If i change other settings, it will save it.


Running on 2022.1 build 14352 even with a previous version (cant remember) it doesnt work.

any idea's ?

edit: need to set this setting, so i can send the doorbel a trigger to homebridge over mqtt

[waltervl]

It is important that you clear your browser cache after updates. Especially when you have user interface issues.
Did you do that?

[007Steve]

It is important that you clear your browser cache after updates. Especially when you have user interface issues.
Did you do that?

Hi all!

also after clearing the browser cache it is not possible to change the field "prevent loop" from "true" to false" ... after updating the settings and remarking the MQTT plugin it still shows "true" ...
Tried to do this change in the browsers EDGE, FireFox and Safari ... clearing the browser cache before ... no chance to get the change saved.
What's wrong here?

Bad situation at the moment for my smart home setup together with NodeRed, because echoing / looping back of mqtt messages does not work and essential scenarions does not work therefore.

[waltervl]

I can confirm that on current 2022.1 stable and beta the prevent loop attribute cannot be set to false on MQTT hardware LAN gateway. As I have no MQTT server it is just a small test.

I would advise to make a Github issue https://github.com/domoticz/domoticz with a reference to this topic.

[FireWizard]

I can confirm as well.

Github issue has been created.
See: https://github.com/domoticz/domoticz/issues/5308

[FireWizard]

Hello @gizmocuz,

I tested it with version 14463, just now, and I'm sorry to say that nothing has changed. The setting is not stored.

If I change "Prevent Loop" from "True" to "False" and then press "Update", it shows as "False", but if I refresh the browser screen (F5) it shows "True" again.
So the issue has not been solved yet.

Thanks for picking up this issue so quickly.

Regards

[FireWizard]

Hi, @007Steve, @Vomera, @waltervl

Issue has been solved in version 14464, published today.

For details see: https://github.com/domoticz/domoticz/issues/5308

I tested it and I consider this issue as solved.

Regards