[{"data":1,"prerenderedAt":1808},["ShallowReactive",2],{"docs-\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fmqtt\u002F":3,"featureCatalog":352,"docs-nav":756},{"id":4,"title":5,"body":6,"description":16,"editUrl":341,"extension":342,"layout":343,"meta":344,"metaTitle":5,"navGroup":343,"navGroupOrder":343,"navOrder":345,"navTitle":30,"navigation":346,"originalPath":343,"path":347,"redirect":343,"seo":348,"stem":349,"updated":350,"version":343,"__hash__":351},"docs\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fmqtt.md","Using MQTT with Node-RED",{"type":7,"value":8,"toc":330},"minimark",[9,13,17,22,32,35,43,47,55,59,62,100,103,114,118,121,171,179,185,188,197,201,204,269,275,283,287,290,327],[10,11,5],"h1",{"id":12},"using-mqtt-with-node-red",[14,15,16],"p",{},"Getting devices to talk to each other in industrial environments isn't trivial. You're dealing with spotty networks, power constraints, and devices that need to share data without constant back-and-forth polling. MQTT solves these problems by keeping communication lightweight and flexible. This guide walks you through what MQTT is, why it works well for IIoT, and how to get it running with Node-RED.",[18,19,21],"h2",{"id":20},"understanding-mqtt","Understanding MQTT",[14,23,24,31],{},[25,26,30],"a",{"href":27,"rel":28},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMQTT",[29],"nofollow","MQTT"," is a messaging protocol that's been around since 1999. It uses a publish-subscribe model, which is different from the request-response pattern you see with HTTP.",[14,33,34],{},"Here's the basic setup: devices\u002Fsystems (clients) connect to a central server called a broker. When a device has data to share, it publishes a message to a specific topic. Other devices\u002Fsystems subscribe to topics they care about and automatically receive messages when they're published. The broker handles all the routing.",[14,36,37,38,42],{},"This architecture means devices\u002Fsystems don't need to know about each other or maintain direct connections. A temperature sensor can publish readings to ",[39,40,41],"code",{},"enterprise\u002Fsite\u002Farea\u002Fline\u002Fcell\u002Ftemperature"," without caring who's listening.",[18,44,46],{"id":45},"setting-up-mqtt-in-node-red","Setting Up MQTT in Node-RED",[14,48,49,50,54],{},"Node-RED comes with MQTT nodes built in, so you don't need to install anything extra. You'll need access to an MQTT broker - you can use a cloud service, run your own with Mosquitto, use a public test broker for experimenting, or if you're using FlowFuse, it provides a ",[25,51,53],{"href":52},"\u002Fblog\u002F2024\u002F10\u002Fannouncement-mqtt-broker\u002F","built-in MQTT broker service",".",[18,56,58],{"id":57},"configuring-the-mqtt-broker-connection","Configuring the MQTT Broker Connection",[14,60,61],{},"Before you can publish or subscribe to messages, you need to configure the broker connection. You only need to do this once - the same broker configuration can be reused across multiple MQTT nodes.",[63,64,65,78,81,84,91,94,97],"ol",{},[66,67,68,69,73,74,77],"li",{},"Add either an ",[70,71,72],"strong",{},"MQTT out"," or ",[70,75,76],{},"MQTT in"," node to your canvas",[66,79,80],{},"Double-click the node to open its configuration",[66,82,83],{},"Click the pencil icon next to \"Server\" to add a new broker connection",[66,85,86,87,90],{},"Enter your broker's address (e.g., ",[39,88,89],{},"broker.flowfuse.cloud",")",[66,92,93],{},"Add the port (usually 1883 for unencrypted, 8883 for TLS)",[66,95,96],{},"If your broker requires authentication, switch to the Security tab in the same configuration dialog by clicking on it \"Security\", then enter your username and password",[66,98,99],{},"Give the connection a name and click Add",[14,101,102],{},"Once configured, this broker connection will appear in the Server dropdown for all MQTT nodes in your flow.",[14,104,105,110],{},[106,107],"img",{"alt":108,"src":109},"Configuring an MQTT broker in Node-RED","\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fimages\u002Fmqtt-broker-config.png",[111,112,113],"em",{},"Setting up the broker connection",[18,115,117],{"id":116},"publishing-messages-to-a-broker","Publishing Messages to a Broker",[14,119,120],{},"Let's start by sending data to an MQTT broker.",[63,122,123,130,135,140,147,154,165],{},[66,124,125,126,129],{},"Add an ",[70,127,128],{},"MQTT Out"," node.",[66,131,132,133,129],{},"Connect your data source node’s output (use an Inject node to simulate data if you don’t have one) to the ",[70,134,128],{},[66,136,137,138,129],{},"Double-click the ",[70,139,128],{},[66,141,142,143,146],{},"Select your configured broker from the ",[70,144,145],{},"Server"," dropdown (or create a new one by following the steps above).",[66,148,149,150,153],{},"Enter a topic such as ",[39,151,152],{},"enterprise\u002Fsite\u002Farea\u002Fline1\u002Fcell\u002Ftemperature"," (topics use forward slashes as separators, similar to file paths).",[66,155,156,157,160,161,164],{},"Set the ",[70,158,159],{},"QoS"," level if needed for message reliability, and enable ",[70,162,163],{},"Retain"," if you want the broker to store the last published message for new subscribers.",[66,166,167,168,54],{},"Click ",[70,169,170],{},"Done",[14,172,173,177],{},[106,174],{"alt":175,"src":176},"MQTT Out node, publishing data to a topic","\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fimages\u002Fmqtt-out.png",[111,178,175],{},[63,180,182],{"start":181},9,[66,183,184],{},"Click Deploy",[14,186,187],{},"The MQTT out node should show \"connected\" with a green dot.",[14,189,190,194],{},[106,191],{"alt":192,"src":193},"Connected MQTT node showing green status","\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fimages\u002Fconnected-mqtt-node.png",[111,195,196],{},"Green status means you're connected",[18,198,200],{"id":199},"subscribing-to-messages-from-a-broker","Subscribing to Messages from a Broker",[14,202,203],{},"Now let's receive messages from the MQTT broker.",[63,205,206,212,218,226,230,235,244,255,260],{},[66,207,125,208,211],{},[70,209,210],{},"MQTT In"," node to the canvas.",[66,213,214,215,129],{},"Add a ",[70,216,217],{},"Debug",[66,219,220,221,223,224,129],{},"Connect the ",[70,222,210],{}," node to the ",[70,225,217],{},[66,227,137,228,129],{},[70,229,210],{},[66,231,142,232,234],{},[70,233,145],{}," dropdown (or create a new one if needed).",[66,236,156,237,240,241,54],{},[70,238,239],{},"Action"," to ",[70,242,243],{},"Subscribe to a single topic",[66,245,246,247,250,251,254],{},"Enter the topic you want to subscribe to, for example: ",[39,248,249],{},"enterprise\u002Fsite\u002Farea\u002F+\u002Fcell\u002Ftemperature"," (the ",[39,252,253],{},"+"," symbol acts as a wildcard for one level).",[66,256,156,257,259],{},[70,258,159],{}," level based on your reliability requirements.",[66,261,167,262,264,265,268],{},[70,263,170],{},", then ",[70,266,267],{},"Deploy"," your flow.",[14,270,271,272,274],{},"Once deployed, you should see the messages appear in the ",[70,273,217],{}," sidebar.",[14,276,277,281],{},[106,278],{"alt":279,"src":280},"MQTT In node, subscribing to a topic","\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fimages\u002Fmqtt-in-config.png",[111,282,279],{},[18,284,286],{"id":285},"using-wildcards-in-topics","Using Wildcards in Topics",[14,288,289],{},"MQTT supports wildcards for subscribing to multiple topics at once:",[291,292,293,312],"ul",{},[66,294,295,298,299,301,302,304,305,308,309],{},[70,296,297],{},"Single-level wildcard (+)",": Matches one level. ",[39,300,249],{}," matches ",[39,303,152],{}," and ",[39,306,307],{},"enterprise\u002Fsite\u002Farea\u002Fline2\u002Fcell\u002Ftemperature"," but not ",[39,310,311],{},"enterprise\u002Fsite\u002Farea\u002Fline1\u002Fcell\u002Fstation1\u002Ftemperature",[66,313,314,317,318,321,322,304,324],{},[70,315,316],{},"Multi-level wildcard (#)",": Matches multiple levels. ",[39,319,320],{},"enterprise\u002Fsite\u002Farea\u002F#"," matches everything under that area, including ",[39,323,152],{},[39,325,326],{},"enterprise\u002Fsite\u002Farea\u002Fline1\u002Fcell\u002Fstation1\u002Fpressure",[14,328,329],{},"When deployed you should again see the status bubble turn green, and have a\ntimestamp appear in the sidebar every second!",{"title":331,"searchDepth":332,"depth":332,"links":333},"",4,[334,336,337,338,339,340],{"id":20,"depth":335,"text":21},2,{"id":45,"depth":335,"text":46},{"id":57,"depth":335,"text":58},{"id":116,"depth":335,"text":117},{"id":199,"depth":335,"text":200},{"id":285,"depth":335,"text":286},"https:\u002F\u002Fgithub.com\u002FFlowFuse\u002Fwebsite\u002Fedit\u002Fmain\u002Fnuxt\u002Fcontent-guides\u002Fnode-red\u002Fprotocol\u002Fmqtt.md","md",null,{},50,true,"\u002Fdocs\u002Fnode-red\u002Fprotocol\u002Fmqtt",{"title":5,"description":16},"docs\u002Fnode-red\u002Fprotocol\u002Fmqtt","2026-09-08 11:02:51 +0200","qkUhINXtQPTGeH7ayHJ8hcYbco_Xiqi0IE4E2egFaIA",{"id":353,"extension":354,"meta":355,"sections":356,"stem":754,"__hash__":755},"featureCatalog\u002Ffeature-catalog.yml","yml",{},[357,418,519,580,657,736],{"id":358,"title":359,"features":360},"ai-automation","AI & Automation",[361,371,381,391,397,407,413],{"id":362,"title":363,"description":364,"docsLink":365,"changelog":366,"tiers":370},"flowfuse-expert-ai","FlowFuse Expert AI","Build industrial apps with agents, and query the state of the factory with an agent. Adapt your current hardware and machines so agentic work can be done against them, without ripping and replacing what's already on the plant floor.","\u002Fdocs\u002Fuser\u002Fexpert\u002F",[367],{"url":368,"release":369},"\u002Fchangelog\u002F2026\u002F02\u002Fff-expert-update-banner\u002F","2.28",{"edge":346,"hub":346,"fleet":346},{"id":372,"title":373,"description":374,"docsLink":375,"changelog":376,"subfeature":346,"showOnPricing":379,"tiers":380},"flowfuse-expert-support-mode","Support Mode","Chat-based assistance for FlowFuse and Node-RED, including Node-RED instance management through natural language.","\u002Fdocs\u002Fuser\u002Fexpert\u002Fchat\u002F#support-mode",[377],{"url":378,"release":369},"\u002Fchangelog\u002F2026\u002F02\u002Fff-expert-debug-log-context\u002F",false,{"edge":346,"hub":346,"fleet":346},{"id":382,"title":383,"description":384,"docsLink":385,"changelog":386,"subfeature":346,"showOnPricing":379,"tiers":390},"flowfuse-expert-application-building","Application Building","Describe what you want to build and FlowFuse Expert assembles it on your workspace, adding tabs, wiring nodes, and configuring properties.","\u002Fdocs\u002Fuser\u002Fexpert\u002Fchat\u002F",[387],{"url":388,"release":389},"\u002Fchangelog\u002F2026\u002F05\u002Fexpert-application-building\u002F","2.30",{"edge":346,"hub":346,"fleet":346},{"id":392,"title":393,"description":394,"docsLink":395,"subfeature":346,"beta":346,"showOnPricing":379,"tiers":396},"flowfuse-expert-insights-mode","Insights Mode","Connects FlowFuse Expert to MCP servers in your Node-RED instances, enabling real-time data queries and actions through a single chat interface.","\u002Fdocs\u002Fuser\u002Fexpert\u002Fchat\u002F#insights-mode",{"edge":346,"hub":346,"fleet":346},{"id":398,"title":399,"description":400,"docsLink":401,"changelog":402,"tiers":406},"third-party-agents","Connect Your Own AI Agent","Point the AI agent your company already uses at FlowFuse, so it can query your teams and instances and build Node-RED applications, with you deciding which teams it reaches and whether it can make changes.","\u002Fdocs\u002Fuser\u002Fexpert\u002Fthird-party-agents\u002F",[403],{"url":404,"release":405},"\u002Fchangelog\u002F2026\u002F08\u002Fconnect-your-own-ai-agent\u002F","3.0",{"edge":346,"hub":346,"fleet":346},{"id":408,"title":409,"description":410,"docsLink":411,"tiers":412},"mcp-servers","Agentic Operations","Expose your Node-RED flows as tools an AI agent can call directly, so agents can query the state of the factory or trigger actions without custom integration work.","\u002Fdocs\u002Fflowfuse-nodes\u002Fmcp\u002F",{"edge":346,"hub":346,"fleet":346},{"id":414,"title":415,"description":416,"tiers":417},"onnx-integration","ONNX Integration","Run trained machine learning models directly in your flows, including on edge hardware, without sending data out to an external inference service.",{"edge":346,"hub":346,"fleet":346},{"id":419,"title":420,"features":421},"build","Build",[422,428,434,444,450,456,460,466,472,480,486,490,494,503,511],{"id":423,"title":424,"description":425,"docsLink":426,"tiers":427},"edge-development","Edge Development","Develop and test Node-RED flows directly on edge devices with a remote editor proxy.","\u002Fdocs\u002Fdevice-agent\u002Fquickstart\u002F",{"edge":346,"hub":379,"fleet":346},{"id":429,"title":430,"description":431,"docsLink":432,"tiers":433},"private-npm-registry","Custom Node-RED Nodes","Create and manage your own private npm registry for Node-RED nodes, so you can share custom nodes across your team and devices without publishing them publicly.","\u002Fdocs\u002Fuser\u002Fcustom-npm-packages\u002F",{"edge":346,"hub":346,"fleet":346},{"id":435,"title":436,"description":437,"docsLink":438,"changelog":439,"tiers":443},"flowfuse-tables","FlowFuse Tables","A managed PostgreSQL database for every application, so you can store and query structured data without standing up and maintaining your own database.","\u002Fdocs\u002Fuser\u002Fff-tables\u002F",[440],{"url":441,"release":442},"\u002Fchangelog\u002F2026\u002F07\u002Fexpert-tables-automation\u002F","2.33",{"edge":346,"hub":346,"fleet":346},{"id":445,"title":446,"description":447,"docsLink":448,"tiers":449},"persistent-files","File Storage","Store and retrieve files from your Node-RED flows, with automatic replication and backup across your devices and hosted instances.","\u002Fdocs\u002Finstall\u002Ffile-storage\u002F",{"edge":346,"hub":346,"fleet":346},{"id":451,"title":452,"description":453,"docsLink":454,"showOnPricing":379,"tiers":455},"persistent-context","Persistent Context","In-memory values defined in a Node-RED flow persist across project restarts and upgrades.","\u002Fdocs\u002Fuser\u002Fpersistent-context\u002F",{"edge":346,"hub":346,"fleet":346},{"id":457,"title":458,"showOnPricing":379,"tiers":459},"static-assets","Static Assets",{"edge":346,"hub":346,"fleet":346},{"id":461,"title":462,"description":463,"docsLink":464,"tiers":465},"team-library","Team Library","Set up standard nodes and flows that can be shared with all team members across your organisation.","\u002Fdocs\u002Fuser\u002Fshared-library\u002F",{"edge":346,"hub":346,"fleet":346},{"id":467,"title":468,"description":469,"docsLink":470,"tiers":471},"personalised-multi-user-dashboards","Personalised Multi-User Dashboards","Build applications that provide unique data to each logged-in user using personalised multi-user dashboards.","https:\u002F\u002Fdashboard.flowfuse.com\u002Fuser\u002Fmulti-tenancy.html",{"edge":346,"hub":346,"fleet":346},{"id":473,"title":474,"description":475,"changelog":476,"subfeature":346,"showOnPricing":379,"tiers":479},"dashboards-view","Dashboards View","Browse and open every dashboard across your team from a dedicated Dashboards view, at both team and application level, without leaving FlowFuse.",[477],{"url":478,"release":442},"\u002Fchangelog\u002F2026\u002F07\u002Fteam-and-application-dashboards\u002F",{"edge":346,"hub":346,"fleet":346},{"id":481,"title":482,"description":483,"docsLink":484,"tiers":485},"blueprints-converge","Blueprints","Ready-made starting points for your apps, from cross-team Converge templates to OT and IT specific blueprints.","\u002Fdocs\u002Fuser\u002Fconcepts\u002F#blueprint",{"edge":346,"hub":346,"fleet":346},{"id":487,"title":488,"subfeature":346,"showOnPricing":379,"tiers":489},"blueprints-ot-apps","Blueprints - OT APPS",{"edge":346,"hub":379,"fleet":346},{"id":491,"title":492,"subfeature":346,"showOnPricing":379,"tiers":493},"blueprints-it-apps","Blueprints - IT APPS",{"edge":379,"hub":346,"fleet":379},{"id":495,"title":496,"description":497,"changelog":498,"showOnPricing":379,"tiers":502},"immersive-editor-snapshots","Snapshot Details in Immersive Editor","View and manage snapshot details directly inside the immersive editor without leaving your editing session.",[499],{"url":500,"release":501},"\u002Fchangelog\u002F2026\u002F03\u002Fsnapshot-detail-modal-immersive-editor\u002F","2.29",{"edge":346,"hub":346,"fleet":346},{"id":504,"title":505,"description":506,"changelog":507,"showOnPricing":379,"tiers":510},"immersive-editor-drawer","Customisable Immersive Editor Drawer","Pin, move, resize, or full-screen the immersive editor drawer. Your preferences are remembered between sessions.",[508],{"url":509,"release":389},"\u002Fchangelog\u002F2026\u002F04\u002Fimmersive-editor-drawer\u002F",{"edge":346,"hub":346,"fleet":346},{"id":512,"title":513,"description":514,"changelog":515,"showOnPricing":379,"tiers":518},"embedded-editor-tab-title","Embedded Editor Browser Tab Title","The browser tab title updates to reflect the active Node-RED canvas tab when working in the embedded editor.",[516],{"url":517,"release":501},"\u002Fchangelog\u002F2026\u002F03\u002Fembedded-editor-tab-title\u002F",{"edge":346,"hub":346,"fleet":346},{"id":520,"title":267,"features":521},"deploy",[522,528,537,543,549,555,561,567,572],{"id":523,"title":524,"description":525,"docsLink":526,"tiers":527},"hosted-instances","Cloud Instances","Run Node-RED instances managed and hosted by FlowFuse.","\u002Fdocs\u002Fuser\u002Fintroduction\u002F#creating-a-node-red-instance",{"edge":346,"hub":346,"fleet":346},{"id":529,"title":530,"description":531,"docsLink":532,"changelog":533,"tiers":536},"edge-devices","Edge Instances","Deploy and mange your Node-RED instances on edge PLCs and gateways, with full visibility and control from the cloud.","\u002Fdocs\u002Fdevice-agent\u002Fintroduction\u002F",[534],{"url":535,"release":369},"\u002Fchangelog\u002F2026\u002F02\u002Fdevice-agent-nodejs-options\u002F",{"edge":346,"hub":379,"fleet":346},{"id":538,"title":539,"description":540,"docsLink":541,"tiers":542},"custom-hostnames","Custom Hostnames","Access your Node-RED application via your own domain name.","\u002Fdocs\u002Fuser\u002Fcustom-hostnames\u002F",{"edge":379,"hub":346,"fleet":379},{"id":544,"title":545,"description":546,"docsLink":547,"tiers":548},"mqtt-broker","MQTT Broker","Manage and create MQTT clients to transport data for efficient messaging and communication within your applications.","\u002Fdocs\u002Fuser\u002Fteambroker\u002F",{"edge":346,"hub":379,"fleet":346},{"id":550,"title":551,"description":552,"docsLink":553,"showOnPricing":379,"tiers":554},"project-nodes","Project Nodes aka seamless project comms","FlowFuse Project Nodes enable the passing of data and messages between your Node-RED projects.","\u002Fdocs\u002Fuser\u002Fprojectnodes\u002F",{"edge":346,"hub":346,"fleet":346},{"id":556,"title":557,"description":558,"docsLink":559,"tiers":560},"devops-pipelines","DevOps Pipelines","Set up different environments for development, testing, and production Node-RED instances to support a full software delivery lifecycle.","\u002Fdocs\u002Fuser\u002Fdevops-pipelines\u002F",{"edge":346,"hub":346,"fleet":346},{"id":562,"title":563,"description":564,"docsLink":565,"tiers":566},"git-integration","Git Integration","Back up your flows to a remote Git repository through a DevOps Pipeline. 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