Subscribe and send info to Python

Agents, Protocols and APIs
1

Hello,

Here is my situation. I am running OpenRemote locally with I have two assets configured and a Python code that sends them data.

This is what I would like to do. Through Python, I want to be able to send data to asset1 which will pass on the information to asset2 (I have created a flow rule for that) and then asset2 would send this data back to the Python code (basically creating a close loop).

I am able to: send the data to asset1 using python, pass on the info from asset1 to asset2 BUT I am unable to automatically send the data from asset2 to Python. The only way that I am able to do so is in the OpenRemote Manager UI by pressing the arrow next to the JSON data that I want to send over.

I have looked around and found some similar topics and it seems that I need to use a MQTT Agent and link it to the Topic that I want to sent over to Python but I cannot find any documentation about it and thus I am struggling quite a lot to make it work.

Can anyone direct me to possible documentation or knows how to do so?
Thanks!

2

Hi Casentive,

could you describe what you actually trying to achieve?
The PAHOMQTT Lib can subscribe and publish, since the paho client is connected, he can subscribe to any topic.

3

Hello Denis,

I am trying to get OpenRemote to automatically send JSON files to my python code.
For example, when asset2 receives a JSON file, I would like it to automatically send said data to any MQTT client that is subscribed to the topic.

At the moment with my python code, I am able to subscribe and receive a JSON file from an asset in OpenRemote but only if I manually press the arrow next to the attribute while my code is connected.
I would like it to be automated so that I don’t have to click it myself every time.

Cheers

4

Could it maybe be done using the Groovy rule?

5

You said:

then you just have to subscribe to the attribute of asset2, you don’t have to publish anything manually.

If you want, you can show your python code.

6

Sure thing here is my code:
OpenRemote_code.zip (1.9 KB)
(I have zipped it because the forum doesn’t allow me to directly upload my python code)

There is a loop created at the bottom where the subscribe action happens (line 152) and the code should receive a JSON load named “Final_E_program”. Let me know if you need any clarification about the code.
Thanks for the help!

7

the code seems ok, could you show a screenshot of your flow?
Next time you could also use pastebin.

8

Hello Denis,

Well now for some reason it is working properly! Maybe I had to restart python, either way, thanks for the help!

9

Glad you got it working. If you have any further questions, just ask. :slight_smile:

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