====== SDK下载 ======
在使用MQTT客户端收发消息前，需根据MQTT所支持的开发语言下载对应SDK。

MQTT服务默认支持标准的MQTT 3.1.1和MQTT 5.0协议，理论上能够适配所有的MQTT客户端，但不排除部分MQTT客户端存在细节上的兼容性问题。

针对MQTT的常用开发语言，推荐对应的第三方SDK如下表所示：
|开发语言|推荐的第三方SDK|开发API参考|
|Java|[[https://www.eclipse.org/paho/index.php?page=clients/java/index.php|Eclipse Paho SDK]]|[[https://www.eclipse.org/paho/files/javadoc/index.html?spm=a2c4g.11186623.0.0.6dfc1845hGWRMF|Java API说明文档]]|
|iOS|[[https://github.com/novastone-media/MQTT-Client-Framework?spm=a2c4g.11186623.2.3.16767b6dSmRBBq|MQTT-Client-Framework]]|无|
|Android|[[https://github.com/eclipse/paho.mqtt.android?spm=a2c4g.11186623.2.4.16767b6dSmRBBq&file=paho.mqtt.android|Eclipse Paho SDK]]|[[https://www.eclipse.org/paho/files/android-javadoc/index.html|Andriod API说明文档]]|
|JavaScript|[[https://www.eclipse.org/paho/index.php?page=clients/js/index.php|Eclipse Paho JavaScript]]|[[https://www.eclipse.org/paho/files/jsdoc/Paho.MQTT.Client.html|JavaScript API说明文档]]|
|Python|[[https://pypi.org/project/paho-mqtt/|Eclipse Paho Python SDK]]|[[https://pypi.org/project/paho-mqtt/#usage-and-api|Python API说明文档]]|
|C|[[https://www.eclipse.org/paho/index.php?page=clients/c/index.php|Eclipse Paho C SDK]]|[[https://www.eclipse.org/paho/files/mqttdoc/MQTTAsync/html/index.html|C API说明文档]]|
|C++|[[https://www.eclipse.org/paho/index.php?page=clients/cpp/index.php|Eclipse Paho C++ SDK]]|[[https://www.eclipse.org/paho/files/cppdoc/index.html|C++ API说明文档]]|
|C#|[[https://github.com/eclipse/paho.mqtt.m2mqtt?spm=a2c4g.11186623.2.8.16767b6dSmRBBq&file=paho.mqtt.m2mqtt|Eclipse Paho C# SDK]]|无|
|Golang|[[https://github.com/eclipse/paho.mqtt.golang?spm=a2c4g.11186623.2.9.16767b6dSmRBBq&file=paho.mqtt.golang|Eclipse Paho Golang SDK]]|[[https://pkg.go.dev/github.com/eclipse/paho.mqtt.golang|Golang API说明文档]]|
|Node.js&小程序|[[https://github.com/mqttjs/MQTT.js?spm=a2c4g.11186623.2.10.16767b6dSmRBBq&file=MQTT.js|MQTT-JS]]|[[https://github.com/mqttjs/MQTT.js?spm=a2c4g.11186623.0.0.6dfc4a92h3959v&file=MQTT.js#api|mqtt.js API说明文档]]|
|PHP|[[https://github.com/mgdm/Mosquitto-PHP?spm=a2c4g.11186623.2.11.16767b6dSmRBBq|Mosquitto-PHP]]|[[https://mosquitto-php.readthedocs.io/en/latest/?spm=a2c4g.11186623.0.0.6dfc4a92h3959v|PHP API说明文档]]|