The devices broadcast a UDP discovery packet on 41414 to 255.255.255.255. The led also listens on a random udp and broadcasts that port with the discovery packet to tell the the client which port to send the actions to.
The scout runs the udp server on the port and listens for packets, once it gets a message it tries to find the device by deviceId in the registry or create a new one if it's the first time seeing it. It also stores the device instances after created with either discover or provision in order to forward the actual data to the device instance.
npm install
node example/server.js &
# Start 3 devices
node devices/example_led.js 1 &
node devices/example_led.js 2 &
node devices/example_photocell.js 3 &
Open zetta browser
http://browser.zettajs.io/#/overview?url=http:%2F%2Flocalhost:3000