Add MQTTProbe

[probonopd]

Repository: https://github.com/bluegrassiot/mqttprobe

The MQTT diagnostic tool built for IIoT. Connect to any MQTT broker, browse live topic trees, inspect payloads, and chart JSON telemetry in real time. Native Sparkplug B decode and EoN node emulation built in. Open source, no cloud required.

• Stars: 37
• Release with the AppImage: v1.0.5 (2026-08-13T11:55:30Z)
• AppImage asset: MQTTProbe.AppImage
• License: unknown

Found by .github/workflows/discover-apps.yml, which looks for GitHub
repositories that publish AppImages but are not in the catalog yet. This
entry was not tested by a human; please review it before merging.

[github-actions]

❌ Test failure

@bluegrassiot: this pull request adds the AppImage from your GitHub repository to the AppImage catalog; the test reports the following. Could you have a look?

Compatibility: not self-contained: uses the C library of the system; references glibc 2.38

• The application quit or crashed right after starting. The error below usually shows why.

First error in the log:

ERROR: The application exited within 11 seconds instead of showing a window

What next: once the AppImage is fixed (e.g. in a new release), comment /retest here to test it again. If it should not be in the catalog after all, close this pull request; an app that is already in the catalog can be removed by a maintainer with /remove.

Commit 0593acd. Full log

[bluegrassiot]

/retest

[github-actions]

❌ Test failure

Tested:

• MQTTProbe.AppImage from release v1.0.6

• The AppImage is missing a required file (see below). See https://docs.appimage.org/reference/appdir.html for what an AppImage must contain.

First error in the log:

FATAL: .DirIcon is missing in /tmp/.mount_runtimKBcoDc

What next: once the AppImage is fixed (e.g. in a new release), comment /retest here to test it again. If it should not be in the catalog after all, close this pull request; an app that is already in the catalog can be removed by a maintainer with /remove.

Commit 0593acd. Full log

[bluegrassiot]

/retest

[github-actions]

❌ Test failure

Tested:

• MQTTProbe.AppImage from release v1.0.7

Compatibility: not self-contained: uses the C library of the system; references glibc 2.35

• The application did not open a window within 30 seconds. It must show its main window when started without arguments.

First error in the log:

ERROR: Could not find a single window on screen :-(

What next: once the AppImage is fixed (e.g. in a new release), comment /retest here to test it again. If it should not be in the catalog after all, close this pull request; an app that is already in the catalog can be removed by a maintainer with /remove.

Commit 0593acd. Full log

[bluegrassiot]

/retest

[github-actions]

✅ Test passed

Please check that the screenshot shows the application's main window.

MQTTProbe

Tested:

• MQTTProbe.AppImage from release v1.0.8

Compatibility: not self-contained: uses the C library of the system; references glibc 2.35

Warnings:

• The AppImage contains no update information, so users cannot update it with AppImageUpdate or similar tools. Please consider embedding it when building the AppImage (e.g., appimagetool -u) and publishing the .zsync file next to the AppImage; see https://docs.appimage.org/packaging-guide/optional/updates.html

Commit 0593acd. Full log