Use start_server() with websocket?

[quintesse]

I was wondering if it's possible to set up a websocket connection with a server that has been started using start_server?

Code examples explaining how to use websocket seem to show that it requires access to a socket which start_server() doesn't seem to provide. Is that correct or am I missing something?

[karfas]

I assume you are talking about asyncio.start_server() ?
This starts a simple TCP server, nothing else. Any connection made from a client needs to be handled by a callback the user provides. This callback is responsible for handling higher level protocols like HTTP (it might e.g. start an asyncio task to handle a request).

Second, I am pretty sure you need at least a minimal HTTP server capable of "promoting" a HTTP connection to a websocket connection.
See e.g. the "Protocol Handshake" section in https://en.wikipedia.org/wiki/WebSocket. I have no idea whether one of the micropython HTTP servers supports this.

[marcidy]

I have an example here: https://github.com/marcidy/micropython-uasyncio-websockets with examples of use here: https://github.com/marcidy/micropython-uasyncio-webexample.

websockets.server.serve uses uasyncio.start_server. You'll need the protocol to be asyncio compatible as well, which that repo provides.

[quintesse]

Thanks that's very useful!