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mqttui is EdJoPaTo’s terminal MQTT client for interactively viewing topic traffic or publishing a message. Its README also documents a publish command for one-off sends, retained messages, and payloads read from standard input, plus a logging mode that writes received messages to standard output. You need access to an MQTT broker; the documented default URI is mqtt://localhost.
What mqttui does
MQTT is a lightweight publish/subscribe messaging protocol: clients exchange messages through a broker rather than addressing one another directly. Eclipse Mosquitto’s MQTT manual describes the protocol and broker model.
EdJoPaTo describes mqttui as a way to “Subscribe to a MQTT Topic or publish something quickly from the terminal.” The project README documents an interactive terminal interface that can subscribe to all topics or a selected topic, along with separate publishing and logging workflows. See the mqttui README for the project’s own command syntax and release guidance.
Connect to a broker
An MQTT client needs a broker to connect to. The README uses mqtt://localhost as the default broker URI and demonstrates a connection to test.mosquitto.org. The latter is a public test-broker example, not a private or production broker; do not send sensitive data to a public test service.
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If you do not have a broker, use a broker you control or an explicitly public test broker. MQTTX’s documentation describes EMQX Cloud as a public broker for testing, but using a hosted service is optional, not a requirement for mqttui: MQTTX manual.
Install mqttui
The project README documents two installation routes: download and extract a release archive, then place the executable somewhere on your PATH; or clone the source and install it with Cargo. It also provides Windows archive guidance. Check the project’s current releases and README before downloading: exact release versions and platform or architecture availability can change.
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Subscribe to MQTT topics interactively
Start mqttui with the broker connection you intend to use, then choose whether to view all topics or a particular topic in its interactive interface. The README documents both subscription scopes. A broad subscription is useful for discovering traffic on a test broker, while a selected topic narrows the live view to a known stream.
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Rank #3
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Publish a message
The README documents a publish subcommand that takes a topic and payload. It also shows retained publishing and reading a payload from standard input. The exact flags and invocation syntax are maintained in the project README; consult it for the version you install rather than assuming flags from another MQTT client will work unchanged.
- Topic and payload: provide the destination topic and message content for a one-off test or send.
- Retained message: retained publishing asks the broker to keep the latest retained value for that topic for future subscribers. Consider whether that behavior is appropriate before sending.
- Standard input: piping payload data lets a script or another command supply the message instead of placing it directly in the command line.
Log received messages to standard output
For non-interactive use, mqttui has a documented logging mode that writes received messages to stdout. The README’s example includes the topic, QoS, payload, and retained-message information. This makes the mode relevant when output should be consumed by a shell pipeline or captured by another process; use the README’s current syntax for enabling it.
Rank #4
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- 【Feature】Add the SMA and TP4054 to the board,which make it can do more things
- 【Advantage】In terms of the power switch, we have changed the switching interaction mode,SMA antenna can enhance signal transmission
- 【Github】github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series
- 【Data transmission】Data can either be be stored on a local SD-card, transferred to cloud using LoRa WAN network or MQTT over TCP/IP, or transmitted to a local host using serial (SPI) interface
How mqttui compares with other MQTT clients
Choose based on how you want to work, which protocol and transports you need, and whether you are inspecting live traffic or automating a send or receive task. The cited documentation supports these workflow distinctions; it does not establish a performance ranking.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors| Tool | Interface and workflow | Documented protocol or features |
|---|---|---|
mqttui |
Interactive terminal topic subscription, publish subcommand, and stdout logging. | The cited README describes these workflows; protocol version and transport details are not stated there. |
| MQTTX | Cross-platform desktop client for testing connections and publishing or subscribing. | MQTT 5.0; its manual also describes WebSocket support and payload format conversion. MQTTX manual |
| MQTTX CLI | Command-line client for MQTT tasks. | MQTT 5.0, according to the MQTTX CLI README. |
mosquitto_pub and mosquitto_sub |
Individual command-line publish and subscribe clients supplied with the Mosquitto package. | Listed as command-line clients in the MQTT.org software catalog. |
For a live terminal view, mqttui’s interactive subscription is the directly documented fit. For scripted, discrete publish and subscribe commands, Mosquitto’s command-line clients or MQTTX CLI are adjacent options. Choose MQTTX’s desktop application if you prefer a graphical interface or need its documented payload conversion and WebSocket features.
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- Working voltage: Wide voltage DC 12-28V
- Working Current : Standby current 15MA, 1 relay open 50MA, 2 relays open 85MA, 3 relays open 120MA, 4 relays open 155MA
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