Roon-core node usage (Roon audio server API), any experience?

Herold · 27 October 2025 07:28

Hi, i've installed roon-core node via NR palette. This node is supposed to deal with Roon (audio library system) API but no docs about configuration and usage. According to https://www.npmjs.com/package/roon-core this node is a wrapper for the roon node.js API.
Any information ? Regards.

marcus-j-davies · 27 October 2025 09:33

Hi @Herold

I have no experience, but I wouldn't pursue it IMO.

No updates in 4 years, and the author hasn't responded to a 3 year old issue - where there Node was crashing a users Node RED instance

github.com/jac459/roon-node-red

Roon Core Node crashing Node Red

opened 09:30PM - 08 Dec 21 UTC

meehab

I have set up the Roon Core node as per instructions and added the sample flow. …I saw an extension appear in Roon, which I enabled. Adding Debug nodes to the sample flow, I see data flowing, and I can see MQTT topics populating as well. So everything seems to be working. However, after initial Node-Red startup, if I click 'Deploy', Node-Red will crash. My Node-Red (v2.1.4) runs in a docker, and if I inspect the log, I see that Roon Core is causing an error that seems to be the cause of the crash. If I restart Node-Red docker, all is well, until the next deploy. Here's the relevant portion of the log file that shows the roon-core node crashing after the deploy command stops and restarts node and flows; ``` 8 Dec 21:21:01 - [info] Stopping flows 8 Dec 21:21:01 - [info] [udp out:64342634.2e1408] udp output stopped 8 Dec 21:21:01 - [info] [udp out:230fb82.e504748] udp output stopped 8 Dec 21:21:01 - [info] [udp in:770903fa.bb1aec] udp listener stopped 8 Dec 21:21:01 - [info] [denon-in:Marantz] Closed 8 Dec 21:21:01 - [info] [denon-connection:AV8805] Closed 8 Dec 21:21:01 - [info] [denon-connection:AV8805] Disconnected 8 Dec 21:21:01 - [info] Stopped flows 8 Dec 21:21:01 - [info] Starting flows 8 Dec 21:21:01 - [info] Started flows 8 Dec 21:21:01 - [info] [udp in:770903fa.bb1aec] udp listener at 0.0.0.0:10000 8 Dec 21:21:01 - [info] [mqtt-broker:mqtt local broker] Connected to broker: presencedetector@mqtt://192.168.1.199:1883 8 Dec 21:21:01 - [info] [mqtt-broker:c9cd3208.c4535] Connected to broker: mqtt://192.168.1.199:1883 8 Dec 21:21:01 - [info] [mqtt-broker:8d10f29d.66b98] Connected to broker: mqtt://localhost:1883 -> REQUEST 0 com.roonlabs.registry:1/info <- COMPLETE 0 Success {"core_id":"e2634122-d408-4430-9584-59ca7937fd8e","display_name":"UNRAID","display_version":"1.8 (build 850) stable"} -> REQUEST 1 com.roonlabs.registry:1/register {"extension_id":"com.jac459.nodeRedRoon","display_name":"Roon Core","display_version":"0.9.9","publisher":"jac459","email":"jeanarnaudcourcier@gmail.com","required_services":["com.roonlabs.transport:2","com.roonlabs.image:1","com.roonlabs.browse:1"],"optional_services":[],"provided_services":["com.roonlabs.status:1","com.roonlabs.pairing:1","com.roonlabs.ping:1"],"website":"https://github.com/jac459/roon-node-red","token":"c034a86f-7d99-439a-8c85-32bd438e3a7d"} MOO: empty message received -> REQUEST 22 com.roonlabs.transport:2/get_zones 8 Dec 21:21:01 - [red] Uncaught Exception: 8 Dec 21:21:01 - [error] TypeError: Cannot read property 'send' of undefined at Transport.send (/data/node_modules/node-roon-api/transport-websocket.js:32:13) at Moo.send_request (/data/node_modules/node-roon-api/moo.js:75:24) at RoonApiTransport.get_zones (/data/node_modules/node-roon-api-transport/lib.js:339:19) at /data/node_modules/roon-core/roon.js:33:31 at /data/node_modules/node-roon-api-transport/lib.js:375:41 at /data/node_modules/node-roon-api/moo.js:27:37 at /data/node_modules/node-roon-api/moo.js:204:10 at Array.forEach (<anonymous>) at Moo.clean_up (/data/node_modules/node-roon-api/moo.js:202:32) at Transport.moo.transport.onclose (/data/node_modules/node-roon-api/lib.js:384:13) at Transport.close (/data/node_modules/node-roon-api/transport-websocket.js:43:14) at WebSocket.Transport.ws.onmessage (/data/node_modules/node-roon-api/transport-websocket.js:24:18) at WebSocket.onMessage (/data/node_modules/ws/lib/event-target.js:120:16) at WebSocket.emit (events.js:400:28) at Receiver.receiverOnMessage (/data/node_modules/ws/lib/websocket.js:800:20) at Receiver.emit (events.js:400:28) at Receiver.dataMessage (/data/node_modules/ws/lib/receiver.js:413:14) at Receiver.getData (/data/node_modules/ws/lib/receiver.js:352:17) at Receiver.startLoop (/data/node_modules/ws/lib/receiver.js:138:22) at Receiver._write (/data/node_modules/ws/lib/receiver.js:74:10) at writeOrBuffer (internal/streams/writable.js:358:12) at Receiver.Writable.write (internal/streams/writable.js:303:10) at Socket.socketOnData (/data/node_modules/ws/lib/websocket.js:875:35) at Socket.emit (events.js:400:28) at addChunk (internal/streams/readable.js:293:12) at readableAddChunk (internal/streams/readable.js:267:9) at Socket.Readable.push (internal/streams/readable.js:206:10) at TCP.onStreamRead (internal/stream_base_commons.js:188:23) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! node-red-docker@2.1.4 start: `node $NODE_OPTIONS node_modules/node-red/red.js $FLOWS "--userDir" "/data"` npm ERR! Exit status 1 ```

All I can tell you, is that there is an example flow

github.com/jac459/roon-node-red

roon-flow.json

main

[{"id":"aa48e052.f69b1","type":"change","z":"d81e3258.d2f79","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"state\":true}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":300,"y":40,"wires":[["f8b68904.ee8da8"]]},{"id":"70b420cd.c0fc8","type":"http in","z":"d81e3258.d2f79","name":"http-request","url":"/roon/discover","method":"get","upload":false,"swaggerDoc":"","x":130,"y":40,"wires":[["aa48e052.f69b1"]]},{"id":"98082675.65bca8","type":"http response","z":"d81e3258.d2f79","name":"","statusCode":"","headers":{},"x":850,"y":20,"wires":[]},{"id":"5a53fcde.3e7eb4","type":"json","z":"d81e3258.d2f79","name":"","property":"payload","action":"","pretty":false,"x":290,"y":80,"wires":[["f8b68904.ee8da8"]]},{"id":"1dbae4a7.3b37eb","type":"mqtt out","z":"d81e3258.d2f79","name":"","topic":"meta/roon/status","qos":"0","retain":"","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"8d10f29d.66b98","x":770,"y":120,"wires":[]},{"id":"e7ef558f.38b388","type":"function","z":"d81e3258.d2f79","name":"","func":"if (msg.res) {\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":720,"y":20,"wires":[["98082675.65bca8"]]},{"id":"1a1dd83c.fe7da8","type":"mqtt out","z":"d81e3258.d2f79","name":"","topic":"meta/roon/state","qos":"0","retain":"true","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"8d10f29d.66b98","x":760,"y":60,"wires":[]},{"id":"f8b68904.ee8da8","type":"roon-core","z":"d81e3258.d2f79","name":"","x":500,"y":80,"wires":[["1a1dd83c.fe7da8","e7ef558f.38b388"],["1dbae4a7.3b37eb"],["1941ee53.32e462"],["e7ef558f.38b388"],["e7ef558f.38b388"]]},{"id":"1941ee53.32e462","type":"http response","z":"d81e3258.d2f79","name":"","statusCode":"","headers":{"content-type":"image/png"},"x":730,"y":180,"wires":[]},{"id":"caf83e8a.ca3a2","type":"http in","z":"d81e3258.d2f79","name":"","url":"/roon/image","method":"get","upload":false,"swaggerDoc":"","x":260,"y":120,"wires":[["f8b68904.ee8da8"]]},{"id":"292ec398.eadcdc","type":"mqtt in","z":"d81e3258.d2f79","name":"","topic":"meta/roon","qos":"2","datatype":"auto","broker":"8d10f29d.66b98","nl":false,"rap":true,"rh":0,"x":120,"y":80,"wires":[["5a53fcde.3e7eb4"]]},{"id":"3c2c80c0.afd0e","type":"http in","z":"d81e3258.d2f79","name":"","url":"/roon/browse","method":"get","upload":false,"swaggerDoc":"","x":250,"y":160,"wires":[["f8b68904.ee8da8"]]},{"id":"a0c628b.665c2d8","type":"http in","z":"d81e3258.d2f79","name":"","url":"/roon/queue","method":"get","upload":false,"swaggerDoc":"","x":260,"y":200,"wires":[["f8b68904.ee8da8"]]},{"id":"8d10f29d.66b98","type":"mqtt-broker","name":"","broker":"localhost","port":"1883","clientid":"","usetls":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"sessionExpiry":""}]

Herold · 28 October 2025 09:51

Hi @marcus-j-davies , thank you for the insight. Any other solution to deal with Roon API ?
Regards

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Roon-core node usage (Roon audio server API), any experience?

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