MQTT Multimeter alias MQTTnetApp is a cross platform .NET application for MQTT communication testing and analysing.

The protocol implementation is based on the MQTTnet project. The application uses Avalonia for UI rendering and runs on nearly any platform and CPU architecture.

Features

General

• Powerful inspection of message data.
• Inspection of raw MQTT messages.
• Publishing of messages.
• Subscribing of messages.
• MQTTv5 features like user properties etc.
• Storage of application state (connections, subscriptions etc.).

Supported operating systems

OS	x86	x64	ARM	ARM64
Windows	x	x		x
Linux		x	x	x
macOS		x		x
Raspberry Pi OS			x	x

Supported MQTT versions

• 5.0.0
• 3.1.1
• 3.1.0

Screenshots

Inflight Page

Connect Page

Packet Inspection Page

Publish Page

Subscribe Page