什么是 iont-node-red-contrib-aws-iot-hub?
iont-node-red-contrib-aws-iot-hub 是一个 npm 包，它提供了与 Amazon Web Services (AWS) 云服务中的 AWS IoT Hub 进行交互的节点。该节点可用于在 Node-RED 工作流中与 AWS IoT Hub 通信，包括发布和订阅主题、修改连接参数等。
如何使用 iont-node-red-contrib-aws-iot-hub？
使用 iont-node-red-contrib-aws-iot-hub 可以分为以下几个步骤：
步骤一：安装 iont-node-red-contrib-aws-iot-hub 包
使用 npm 安装 iont-node-red-contrib-aws-iot-hub 包：
npm install @ionic-native/aws-iot-hub
步骤二：在 Node-RED 中使用 iont-node-red-contrib-aws-iot-hub 节点
在 Node-RED 编辑器中，单击右上角的菜单按钮，选择 "Manage palette"。在 "Install" 选项卡中，搜索 "aws-iot-hub" 并安装 "node-red-contrib-aws-iot-hub" 节点。完成安装后，您可以在 Node-RED 工作流编辑器中找到 "aws-iot-hub" 节点。
步骤三：配置 iont-node-red-contrib-aws-iot-hub 节点
双击 "aws-iot-hub" 节点，打开配置窗口。在 "Connection" 选项卡中，输入 AWS IoT Hub 的终端节点、客户端 ID、私钥和证书等信息。在 "Subscribe" 选项卡中，输入要订阅的主题名称。单击 "Done" 保存配置。
步骤四：在 Node-RED 工作流中使用 iont-node-red-contrib-aws-iot-hub 节点
将 "aws-iot-hub" 节点从左侧工具栏拖到工作流中，将其与其他节点连接。可以使用 "Payload" 节点创建要发布的消息，也可以使用 "Debug" 节点显示接收到的消息。在 "Deploy" 按钮上单击以部署工作流。
示例代码
以下代码演示了如何发布和接收来自 AWS IoT Hub 的消息：
[{"id":"241681e1.0fde5","type":"aws-iot-hub","z":"43ecb057.326b9","name":"AWS IoT Hub","connection":"2bb29e6d.21a2dc","subscribe":"test","x":310,"y":200,"wires":[["a10024e6.e0685"]]},{"id":"8b8fe090.29fbd8","type":"inject","z":"43ecb057.326b9","name":"Publish","props":[{"p":"payload"},{"p":"topic","v":"test","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"Hello World!","payloadType":"str","x":100,"y":200,"wires":[["dc1affd8.eba16"]]},{"id":"dc1affd8.eba16","type":"function","z":"43ecb057.326b9","name":"Create Msg","func":"var topic = msg.topic;\nvar message = {payload:msg.payload};\nreturn { topic: topic, message: message };","outputs":1,"noerr":0,"x":180,"y":120,"wires":[["47f44d6.08469f8"]]},{"id":"47f44d6.08469f8","type":"aws-iot-hub in","z":"43ecb057.326b9","name":"AWS IoT Hub In","connection":"2bb29e6d.21a2dc","x":310,"y":120,"wires":[["ddb365c6.7d58b"]]},{"id":"6722eed2.aa474c","type":"debug","z":"43ecb057.326b9","name":"Debug","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":550,"y":200,"wires":[]},{"id":"a10024e6.e0685","type":"function","z":"43ecb057.326b9","name":"Parse Msg","func":"var payload = msg.payload.payload;\nmsg.payload = payload;\nreturn msg;","outputs":1,"noerr":0,"x":470,"y":120,"wires":[["6722eed2.aa474c"]]},{"id":"ddb365c6.7d58b","type":"debug","z":"43ecb057.326b9","name":"Debug","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":430,"y":320,"wires":[]},{"id":"2bb29e6d.21a2dc","type":"aws-iot-hub-connection","z":"","name":"","host":"xxxxxxxxxxxxxx-ats.amazonaws.com","clientId":"test","privateKey":"","certificate":"","ca":"","region":"us-east-1","tlsauth":"","usetls":true}]总结
iont-node-red-contrib-aws-iot-hub 是一个有用的 npm 包，可帮助前端开发人员与 AWS IoT Hub 进行交互，以便在 Node-RED 工作流中完成复杂的 IoT 任务。本篇文章主要介绍了如何使用该包，并提供了示例代码。希望这篇文章对你有帮助！
来源：JavaScript中文网 ，转载请注明来源 https://www.javascriptcn.com/post/60056be981e8991b448e5a3a