flutter pub add mqtt_client根據套件公開資料產生的選型評估，僅供參考。
mqtt_client 套件是 Dart 實作的 MQTT 客戶端，可實現裝置與伺服器之間的即時通訊。它支援標準、安全（TLS）及 WebSocket 連線，適用於伺服器端與瀏覽器應用程式。此套件設計為跨平台使用，可在 Android、iOS、Web、macOS、Windows 與 Linux 上順暢運作。非常適合物聯網專案，能提供輕量級、發布-訂閱式訊息傳遞，具備低延遲與高效率的特性。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
A server and browser based MQTT client for Dart.
The client is an MQTT v3(3.1 and 3.1.1) implementation(an equivalent MQTT v5 client can be found here) supporting subscription/publishing at all QOS levels, keep alive and synchronous connection. The client is designed to take as much MQTT protocol work off the user as possible, connection protocol is handled automatically as are the message exchanges needed to support the different QOS levels and the keep alive mechanism. This allows the user to concentrate on publishing/subscribing and not the details of MQTT itself.
Examples of usage can be found in the examples directory. An example is also provided showing how to use the client to connect to the mqtt-bridge of Google's IoT-Core suite. This demonstrates how to use secure connections and switch MQTT protocols. The test directory also contains standalone runnable scripts demonstrating subscription, publishing and topic filtering.
The server client supports both normal and secure TCP connections and secure(wss) and non-secure(ws) websocket connections. The browser client supports only secure(wss) and non-secure(ws) websocket connections.
The client has been used successfully with the MQTT brokers from several of the major cloud providers IOT/MQTT platforms, including :-
It has also been used with a range of both publicly available brokers such as Mosquitto and proprietary ones. An example using the adafruit MQTT broker for flutter can be found here.
The code is originally a port from the C# nMQTT client library to Dart.
Please read the changelog for details related to specific versions.
If you are using the client in a flutter environment on Android or iOS devices then the following device permission settings are necessary.
Add the following keys to your Info.plist file, located in ios/Runner/Info.plist:
<key>NSLocalNetworkUsageDescription</key>
<string>Looking for local tcp Bonjour service</string>
<key>NSBonjourServices</key>
<array>
<string>mqtt.tcp</string>
</array>
Add the following Android permissions to the AndroidManifest.xml file, located in android/app/src/main/AndroidManifest.xml:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
依賴清單 7 項
^1.4.0^3.0.6^2.0.1^1.16.0^1.9.1^1.4.0>=0.5.0 <2.0.0