连接到 MQTT 代理
问题
您希望连接到本地运行的 MQTT 代理。
解决方案
使用 MQTT Input 输入或 MQTT Output 节点以及关联的 MQTT Config 节点来连接到 MQTT 代理。
示例
[{"id":"2c6873d2.992abc","type":"mqtt out","z":"eda2a949.74ea98","name":"","topic":"sensors/livingroom/temp","qos":"","retain":"","broker":"407a01e4.6b637","x":330,"y":80,"wires":[]},{"id":"d9beed59.94155","type":"inject","z":"eda2a949.74ea98","name":"","topic":"","payload":"22","payloadType":"num","repeat":"","crontab":"","once":false,"x":150,"y":80,"wires":[["2c6873d2.992abc"]]},{"id":"be80048.8f232f8","type":"mqtt in","z":"eda2a949.74ea98","name":"","topic":"sensors/livingroom/temp","qos":"2","broker":"407a01e4.6b637","x":170,"y":160,"wires":[["8640b8ff.f82ff8"]]},{"id":"8640b8ff.f82ff8","type":"debug","z":"eda2a949.74ea98","name":"","active":true,"console":"false","complete":"false","x":370,"y":160,"wires":[]},{"id":"407a01e4.6b637","type":"mqtt-broker","z":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]
讨论
许多用户会在运行 Node-RED 的同一台 Raspberry Pi 或 PC 上运行 MQTT 代理，例如 mosquitto。在您的流程中有了 MQTT 输入或输出节点后，您可以通过双击该节点，然后单击 添加 MQTT 代理... 下拉菜单右侧的铅笔按钮来创建一个 MQTT Config 节点。假设您的代理是开放的，将服务器主机设置为 localhost，并将端口保留为 1883。
要连接到非本地、安全的代理，需要根据您的代理连接要求设置其他 MQTT Config 节点选项。
