This is a ws client that mimic a controller Another type of client is the web page that reads device status and send commands to controller (via server)

server is defined in ws.ts. Server's role includes

1. connect/disconnect socket sessions to different clients
2. manage channels
3. relay messages
4. sends type "metadata" on interval (see ws.ts, sendMetaData function)

Type of messages and their format that server sends is defined in grage-lib/lib.ts

1. Channel messages, action: relay message to all clients on the channel. This includes 1.1 Data message 1.2 Ping 1.3 rping
2. Connect messages, action: connect to the clients that are in channel message.id
3. Data messages, relay

Channel structure There are "channels" on both ws server and client script grage.ts. They have different meanings

1. In server (ws.ts), its structure looks like {id, socket[]} 1.1 each channel has an ID 1.2 each channel has an array of socket clients
2. On client, channels is an array of listeners : {id, {listener1,listener2...}}