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var discover = require("@ionic/discover")

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@ionic/discover v2.0.1

Simple UDP based protocol for service discovery implemented in pure JS.

Ionic Discover

Simple UDP based protocol for service discovery implemented in pure JS. It is not mDNS or bonjour, but it tries to accomplish the same thing.


It uses a JSON based textual format:

const message = {
  t: now,
  id: 'unique',
  host: os.hostname(),
  ip: iface.address,
  port: number1,
  commPort: number2

return 'ION_DP' + JSON.stringify(message);
tunix timestamp in second
idunique id for this session
namename of the announced service
hosthostname of the machine announcing the service
ipipv4 address
porttcp port of the announced service
commPortoptional websocket port of the communication server


npm install @ionic/discover


import { Publisher } from '@ionic/discover';

const namespace = 'your-service';
const serviceName = 'Ionic thing!';
const tcpPort = 8100;
const service = new Publisher(namespace, serviceName, tcpPort);

await service.start();
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