WebSocket Server and Client for Arduino

a WebSocket Server and Client for Arduino based on RFC6455.

Supported features of RFC6455

• text frame
• binary frame
• connection close
• ping
• pong

Not supported features of RFC6455

• continuation frame

Limitations

• max input length is limited to the ram size and the WEBSOCKETS_MAX_DATA_SIZE define
• max output length has no limit (the hardware is the limit)
• Client send big frames with mask 0x00000000 (on AVR all frames)

Limitations for Async

• Functions called from within the context of the websocket event might not honor yield() and/or delay(). See this issue for more info and a potential workaround.
• wss / SSL is not possible.

Supported Hardware

• ESP8266 Arduino for ESP8266
• ESP31B
• ATmega328 with Ethernet Shield (ATmega branch)
• ATmega328 with enc28j60 (ATmega branch)
• ATmega2560 with Ethernet Shield (ATmega branch)
• ATmega2560 with enc28j60 (ATmega branch)

Note:

version 2.0 and up is not compatible with AVR/ATmega, check ATmega branch.

Arduino for AVR not supports std namespace of c++.

wss / SSL

supported for:

• wss client on the ESP8266

ESP Async TCP

This libary can run in Async TCP mode on the ESP.

The mode can be aktivated in the WebSockets.h (see WEBSOCKETS_NETWORK_TYPE define).

ESPAsyncTCP libary is required.

Issues

Submit issues to: https://github.com/Links2004/arduinoWebSockets/issues

License and credits

The library is licensed under LGPLv2.1

libb64 written by Chris Venter. It is distributed under Public Domain see LICENSE.