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Load data from IE Databus into own app

Created by: Lars_1603 at: 7/27/2021 3:51 PM (7 Replies)

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7/27/2021 3:51 PM	Rate (0)
Lars_1603 Member Joined: 5/21/2021 Last visit: 10/10/2024 Posts: 11 Rating: (0)	Hi everyone, I am currently programming my own app for Industrial Edge with an ASP.NET Core web application. The app should later be able to display machine data in real time. I also have the Performance Insight app and it already works fine. The connection to the PLC works perfectly. That means I have already configured the S7 Connector with OPC UA, the IE Databus and the IE Data Service. I am also aware that the IE Databus works with an MQTT broker. My question now is: Is there a simple example of how to program such an MQTT client connection in C#? My goal is just to load the data from Industrial Edge into my own app. What is the easiest way to do this .NET? Does somebody has any idea? And do I have to connect to the IE data bus or the IE data service? I have attached a picture of the configuration of the IE Databus. Thanks in advance Lars Attachment 29.JPG (997 Downloads)

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7/27/2021 3:59 PM	Rate (0)
Berle_C Regular Member Joined: 3/8/2017 Last visit: 11/12/2024 Posts: 16 Rating: (3)	Hi Lars, you can connect to the IE Databus just like to any other MQTT Broker (e.g. moqsuitto) if you configure your app to be in the "proxy-redirect" network and set the hostname of the broker to "ie-databus". You will then receive the cyclic updates of the PLC values from the OPC Connection. You can also connect to the DataService through a REST API for access to the DataService Database. We only have an example in JavaScript but there are probably numerous tutorials for C# in the web. JS Example: Github Pingpong Please check https://github.com/industrial-edge for more Tutorials. This Developer Guide might also be interesting to you Github Dev Guide ; SIOS Dev Guide
	Last edited by: Berle_C at: 07/27/2021 16:02:35
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7/28/2021 1:27 PM	Rate (0)
KaulE Member Joined: 4/28/2015 Last visit: 11/7/2024 Posts: 10 Rating: (1)	Hello Lars, the HowTo Databus Ping Pong C# shows exactly what you are looking for. That is an app example written in C#, that also includes an MQTT client to connect to the Edge Databus and get data out of topics. This data can then be used within the app.

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7/29/2021 11:45 AM	Rate (0)
Lars_1603 Member Joined: 5/21/2021 Last visit: 10/10/2024 Posts: 11 Rating: (0)	Thank you two for the answers. I will try that with the MQTT connection at some point, but my plans have changed at short notice. I am currently trying to import the data of the variables into my app via the REST API of the IE Data Service. The advantage here is that I can configure the variables in advance. That's why I looked at the API documentation of the IE Data Service and found out how to generate the URL of such a query. Here is an example for reading out one of my variables from 07/28/21: https://{myIP}/DataService/Data/fd216d5441424973a3938105d9f0816c?from=2021-07-28T00:00:00.000Z&to=2021-07-29T00:00:00.000Z If I enter this in my browser and am logged into the device's interface at the same time, this query works without problems and I get the values displayed in a JSON view in the browser. (See attachement) However, if I program this query in my app, an error message with the code "401 - Unauthorized" is returned, which means that I am not logged in or not authorized. How do I manage to get access to the API via my app? What exactly do I have to specify to authorize myself? Is there any experience of what exactly I have to program? Actually it should work, because I access the same IP, I am logged in there and also get the results in the browser. Thanks in advance Lars Attachment JasonAPI.JPG (1158 Downloads)

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7/29/2021 1:16 PM	Rate (1)
HummelN Advanced Member Joined: 4/21/2015 Last visit: 10/29/2024 Posts: 33 Rating: (12)	Hello Lars, I guess you cannot connect to the Dataservice as you are trying to reach to the API via the public IP address. So your app tries to connect from the outside. This only works if you log in to your Edge Device in advance, unfortuanetly there is not yet a public API of the IED available for doing this (to be more precise, there are already APIs, but not yet documented and so not yet released). Fortuanetly I have another idea. You can try to connect to the Data-Service via the internal service name. "https://edgeappdataservice:4203" instead of the external IP. I have not tried by my own to be honest, but you can give it a try. Btw. do you already know the Data Service Development Kit, this is a local Data-Service version, which you can run on your development environment to test the API calls locally. - Dev-Kit - Getting Started Dev-Kit
	Last edited by: HummelN at: 07/30/2021 11:34:28
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This contribution was helpful to 1 thankful Users Lars_1603

8/3/2021 2:08 PM	Rate (0)
Lars_1603 Member Joined: 5/21/2021 Last visit: 10/10/2024 Posts: 11 Rating: (0)	Thank you for your message HummelN :) Ok yes it could of course be that external access is not possible. On the other hand, I give the browser the same IP as in my app (which is also opened in the browser) and the browser can access the data and my app can not. I find that very confusing. I also tried the internal service name. The URL was then: "https://edgeappdataservice:4203/DataService/Data/fd216d5441424973a3938105d9f0816c?from=2021-07-28T00:00:00.000Z&to=2021-07-29T00:00:00.000Z" But then there is an error message. (See attachement) I'll try to find a solution from the GitHub repository (or StackOverflow or sth.), otherwise I don't know what to do next ... Attachment error.JPG (942 Downloads)

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8/3/2021 3:12 PM	Rate (0)
Lars_1603 Member Joined: 5/21/2021 Last visit: 10/10/2024 Posts: 11 Rating: (0)	UPDATE: I don't know if it was the HTTPS instead of the HTTP or what caused the error, but now it works internally. I tried again, but this time with HTTP and not HTTPS (which actually makes sense). So the URL was: "http://edgeappdataservice:4203/DataService/Data/fd216d5441424973a3938105d9f0816c?from=2021-07-28T00:00:00.000Z&to=2021-07-29T00:00:00.000Z" After that, my query worked in the containerized app within Industrial Edge. (See attachement) Thank you :) Attachment Unbenannt11.JPG (1035 Downloads)

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8/3/2021 3:52 PM	Rate (0)
HummelN Advanced Member Joined: 4/21/2015 Last visit: 10/29/2024 Posts: 33 Rating: (12)	Hello Lars, great to hear that your application is working now You are right, when you access the data-service API internally via the service name you need to go for http instead of https.

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