Websockets For Circuitpython

My tests with uwebsockets on circuitpython before maybe making a genuine fork/port.

The code has been adpated to the ESP32S2 firt, then back to using socket.recv and such. It is not currently based on the latest uwebsockets, but an older version that I was using and worked with my code. Don't forget to fill in the wifi SSID and password in secrets.py.

Universal Sockets branch for ESP32S2 and Airlift

• Create a websockets.Session with:

  • socket the socket module.
  • ssl= the ssl_context for S2 (optional).
  • iface= the ESP_SPIcontrol interface object (optional).

• with session.client(url) as ws

  • Connect as a client and return the WebSockets object.
  • Url is ws://server:port or wss://server:port
  • Use ws.send and ws.recv to exchange data with the server.

• Uses a UniversalSocket abstraction class to encapsulate the differences.

  • uwebsockets client and protocol are left as unchanged as possible.
  • (For now)

• Tested on FeatherS2.

• Tested on nrf52840 Feather + Airflit Featherwing.

Original uwebsockets implementation: https://github.com/danni/uwebsockets

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