{"id":22039490,"url":"https://github.com/mpolinowski/nodered-mqtt-connect","last_synced_at":"2026-04-30T18:32:06.064Z","repository":{"id":111484003,"uuid":"145702870","full_name":"mpolinowski/nodered-mqtt-connect","owner":"mpolinowski","description":"A Collection of Node-RED MQTT 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unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["mqtt","mqtt-client","node-red","node-red-flow"],"created_at":"2024-11-30T11:10:59.647Z","updated_at":"2026-04-30T18:32:06.049Z","avatar_url":"https://github.com/mpolinowski.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# A Collection of Node-RED MQTT Recipes\n\nWe are going to use a [MQTT](https://thenewstack.io/mqtt-protocol-iot/) Broker to test our Node-RED flows under Windows - the MQTT.fx Software can be [downloaded here](https://mqttfx.jensd.de/index.php/download).\n\n\n## Connect to an MQTT Broker\n\nThe Node-RED flow that we are going to write in a moment, is going to broadcast `@sensors/livingroom/mqtt07` - so the first step is to subscribe our broker to it:\n\n![MQTT.fx](./node-red-mqtt_01.png)\n\n\nImport the following flow to Node-RED - It uses the __MQTT Input__ input and __MQTT Output__ node and an associated __MQTT Config__ node to connect to an MQTT broker.\n\n```json\n[{\"id\":\"1be4a3d2.9a1e7c\",\"type\":\"mqtt in\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"topic\":\"sensors/livingroom/mqtt07\",\"qos\":\"2\",\"broker\":\"47feb3e4.56f11c\",\"x\":100,\"y\":100,\"wires\":[[\"7c273733.6783e8\"]]},{\"id\":\"7c273733.6783e8\",\"type\":\"debug\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"active\":true,\"tosidebar\":true,\"console\":false,\"complete\":\"false\",\"x\":290,\"y\":100,\"wires\":[]},{\"id\":\"47feb3e4.56f11c\",\"type\":\"mqtt-broker\",\"z\":\"\",\"broker\":\"localhost\",\"port\":\"1883\",\"clientid\":\"\",\"usetls\":false,\"compatmode\":true,\"keepalive\":\"60\",\"cleansession\":true,\"birthTopic\":\"\",\"birthQos\":\"0\",\"birthPayload\":\"\",\"willTopic\":\"\",\"willQos\":\"0\",\"willPayload\":\"\"}]\n```\n\n\n![MQTT.fx](./node-red-mqtt_02.png)\n\n\nTriggering the flow will send a JSON Message via the MQTT protocol, that will now be caught by MQTT.fx\n\n\n![MQTT.fx](./node-red-mqtt_03.png)\n\n\nWe can now use the __MQTT Output__ node to publish messages to a topic:\n\n\n```json\n[{\"id\":\"9c138886.116928\",\"type\":\"mqtt out\",\"z\":\"eda2a949.74ea98\",\"name\":\"\",\"topic\":\"sensors/kitchen/mqtt07\",\"qos\":\"\",\"retain\":\"\",\"broker\":\"61de5090.0f5d9\",\"x\":430,\"y\":100,\"wires\":[]},{\"id\":\"ff654e7f.32e9e\",\"type\":\"inject\",\"z\":\"eda2a949.74ea98\",\"name\":\"temperature\",\"topic\":\"\",\"payload\":\"22\",\"payloadType\":\"num\",\"repeat\":\"\",\"crontab\":\"\",\"once\":false,\"x\":230,\"y\":100,\"wires\":[[\"9c138886.116928\"]]},{\"id\":\"61de5090.0f5d9\",\"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\":\"\"}]\n```\n\n\nYou can use the __MQTT Input__ node and a __JSON node__ to receive a parsed JSON message:\n\n\n```json\n[{\"id\":\"8024cb4.98c5238\",\"type\":\"mqtt in\",\"z\":\"eda2a949.74ea98\",\"name\":\"\",\"topic\":\"sensors/#\",\"qos\":\"2\",\"broker\":\"61de5090.0f5d9\",\"x\":260,\"y\":580,\"wires\":[[\"b5098b7f.2361d8\"]]},{\"id\":\"15d727dd.33e808\",\"type\":\"debug\",\"z\":\"eda2a949.74ea98\",\"name\":\"\",\"active\":true,\"console\":\"false\",\"complete\":\"false\",\"x\":530,\"y\":580,\"wires\":[]},{\"id\":\"2aed678c.3de738\",\"type\":\"mqtt out\",\"z\":\"eda2a949.74ea98\",\"name\":\"\",\"topic\":\"sensors/livingroom/temp\",\"qos\":\"\",\"retain\":\"false\",\"broker\":\"61de5090.0f5d9\",\"x\":310,\"y\":520,\"wires\":[]},{\"id\":\"3b613a69.a247c6\",\"type\":\"inject\",\"z\":\"eda2a949.74ea98\",\"name\":\"temp json\",\"topic\":\"\",\"payload\":\"{\\\"sensor_id\\\":1234,\\\"temperature\\\":13}\",\"payloadType\":\"json\",\"repeat\":\"\",\"crontab\":\"\",\"once\":false,\"x\":120,\"y\":520,\"wires\":[[\"2aed678c.3de738\"]]},{\"id\":\"b5098b7f.2361d8\",\"type\":\"json\",\"z\":\"eda2a949.74ea98\",\"name\":\"\",\"pretty\":false,\"x\":390,\"y\":580,\"wires\":[[\"15d727dd.33e808\"]]},{\"id\":\"61de5090.0f5d9\",\"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\":\"\"}]\n```\n\n\nUse the __MQTT Input__ node to subscribe to messages sent to a topic or a topic pattern:\n\n```json\n[{\"id\":\"31edb119.efc91e\",\"type\":\"mqtt in\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"topic\":\"hello/sensor\",\"qos\":\"2\",\"broker\":\"520ad9a0.e248f8\",\"x\":80,\"y\":360,\"wires\":[[\"ebdeaa8d.d92938\"]]},{\"id\":\"d2e90de6.cdb69\",\"type\":\"debug\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"active\":true,\"tosidebar\":true,\"console\":false,\"complete\":\"false\",\"x\":350,\"y\":360,\"wires\":[]},{\"id\":\"ebdeaa8d.d92938\",\"type\":\"json\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"pretty\":false,\"x\":210,\"y\":360,\"wires\":[[\"d2e90de6.cdb69\"]]},{\"id\":\"a3d8c237.39c09\",\"type\":\"mqtt in\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"topic\":\"hello/sensor\",\"qos\":\"2\",\"broker\":\"7564ccbd.a16c44\",\"x\":80,\"y\":300,\"wires\":[[\"f8f863ee.c6892\"]]},{\"id\":\"f8f863ee.c6892\",\"type\":\"debug\",\"z\":\"9bdc093c.fd4b08\",\"name\":\"\",\"active\":true,\"tosidebar\":true,\"console\":false,\"complete\":\"false\",\"x\":230,\"y\":300,\"wires\":[]},{\"id\":\"520ad9a0.e248f8\",\"type\":\"mqtt-broker\",\"z\":\"\",\"broker\":\"localhost\",\"port\":\"1883\",\"clientid\":\"\",\"usetls\":false,\"compatmode\":true,\"keepalive\":\"60\",\"cleansession\":true,\"birthTopic\":\"\",\"birthQos\":\"0\",\"birthPayload\":\"\",\"willTopic\":\"\",\"willQos\":\"0\",\"willPayload\":\"\"},{\"id\":\"7564ccbd.a16c44\",\"type\":\"mqtt-broker\",\"z\":\"\",\"broker\":\"localhost\",\"port\":\"1883\",\"clientid\":\"\",\"usetls\":false,\"compatmode\":true,\"keepalive\":\"60\",\"cleansession\":true,\"birthTopic\":\"\",\"birthQos\":\"0\",\"birthPayload\":\"\",\"willTopic\":\"\",\"willQos\":\"0\",\"willPayload\":\"\"}]\n```\n\n![MQTT.fx](./node-red-mqtt_04.png)\n\nWe are now able to receive the MQTT message from our broker in Node-RED:\n\n![MQTT.fx](./node-red-mqtt_05.png)","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmpolinowski%2Fnodered-mqtt-connect","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmpolinowski%2Fnodered-mqtt-connect","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmpolinowski%2Fnodered-mqtt-connect/lists"}