How to delete Topics in Kafka
Deleting Kafka Topics using Kowl
Others
Here are generally helpful articles, that cannot be attributed to other sections.
less than a minute
In these articles you will see articles, which don’t necessarily fit into the other sections of this site.
As with all other parts of learn.umh.app, please feel free to let us know if you feel like there is information missing.
If you are interested in getting more information about what the United Manufacturing Hub is or want to read up on the technical documentation, visit the documentation. If you are interested about the reasons behind the architecture or the technology and, visit the knowledge section.
Connecting Kepware with the OPC-UA simulator
Tutorial on how to connect kepware with the OPCUA simulator
Install Softing EdgeAggregator in the UMH
Tutorial on using the proprietary software Softing EdgeAggregator with the United Manufacturing Hub
Connecting UA-Expert with the OPC-UA simulator
This tutorial shows you how to connect the UA-Expert with the OPC-UA simulator
How does the access to the postgresql database work?
In this article we are detailing how to access the database internally and externally
Uninstalling local k3d-/minikube-installation
Deinstalling local installations
How to setup configurations in draw.io documentations
This article explains how to fill the references inside the documentation of projects in Draw.io
Customize your local installation
This page explains how to customize the values of the Helm chart without changing the defaults
Committing to GitHub repository
Here the process of committing to GitHub projects via the git commands is explained.
Long running distinct queries
When using Grafana and having a lot of time-series data, it might take a while until the dropdown menu appears (up to a time when it does not work at all anymore).
Adding a new tag or data point to United Manufacturing Hub stack
This tutorial describes what it is needed for creating and storing a custom data point.
How to visualize data stored in redis?
This troubleshooting guide describes how to see data in redis, when working with it.
How to use createdb and not fail when using custom postgres?
This troubleshooting guide describes the solution when using custom postgresql, createdb fails as ‘local user with ID 1001 does not exist’
How to solve chirpstack / redis throwing 'EXECABORT Transaction discarded because of previous errors'?
This troubleshooting guide describes the solution when installing chirpstack and using with UMH, the following error message can appear: EXECABORT Transaction discarded because of previous errors
Using Kowl for inspecting messages
How-to use Kowl to inspect Kafka messages
Publishing a new version
The UMH uses the semantic versioning. This article explains how to increase the version number and what steps are needed to take
Connecting with SSH
How to connect to a Linux device using SSH (for Windows and Linux)
Installing helm and GitHub CLI
How to install Helm for Kubernetes and the GitHub CLI on Windows using chocolatey
Cloning a project’s repo to your desktop
In this Instruction you learn, how you will be able to ‘copy’ (the code-loving people call it clone) an GitHub-Project-Folder to your desktop.
No messages can be seen in MQTT-Explorer
When you can’t see messages coming through from the machine, do the following.
Setting up the MQTT broker to see MQTT-messages
There are two options to see your messages in MQTT
Last modified February 17, 2023: update (#208) (ea731fc)