98 lines
3.6 KiB
Markdown
98 lines
3.6 KiB
Markdown
WebSocket Server and Client for Arduino [](https://travis-ci.org/Links2004/arduinoWebSockets)
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===========================================
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a WebSocket Server and Client for Arduino based on RFC6455.
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##### Supported features of RFC6455 #####
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- text frame
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- binary frame
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- connection close
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- ping
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- pong
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- continuation frame
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##### Limitations #####
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- max input length is limited to the ram size and the ```WEBSOCKETS_MAX_DATA_SIZE``` define
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- max output length has no limit (the hardware is the limit)
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- Client send big frames with mask 0x00000000 (on AVR all frames)
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- continuation frame reassembly need to be handled in the application code
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##### Limitations for Async #####
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- Functions called from within the context of the websocket event might not honor `yield()` and/or `delay()`. See [this issue](https://github.com/Links2004/arduinoWebSockets/issues/58#issuecomment-192376395) for more info and a potential workaround.
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- wss / SSL is not possible.
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##### Supported Hardware #####
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- ESP8266 [Arduino for ESP8266](https://github.com/esp8266/Arduino/)
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- ESP32 [Arduino for ESP32](https://github.com/espressif/arduino-esp32)
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- ESP31B
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- Particle with STM32 ARM Cortex M3
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- ATmega328 with Ethernet Shield (ATmega branch)
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- ATmega328 with enc28j60 (ATmega branch)
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- ATmega2560 with Ethernet Shield (ATmega branch)
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- ATmega2560 with enc28j60 (ATmega branch)
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###### Note: ######
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version 2.0 and up is not compatible with AVR/ATmega, check ATmega branch.
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Arduino for AVR not supports std namespace of c++.
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### wss / SSL ###
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supported for:
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- wss client on the ESP8266
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- wss / SSL is not natively supported in WebSocketsServer however it is possible to achieve secure websockets
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by running the device behind an SSL proxy. See [Nginx](examples/Nginx/esp8266.ssl.reverse.proxy.conf) for a
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sample Nginx server configuration file to enable this.
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### ESP Async TCP ###
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This libary can run in Async TCP mode on the ESP.
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The mode can be activated in the ```WebSockets.h``` (see WEBSOCKETS_NETWORK_TYPE define).
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[ESPAsyncTCP](https://github.com/me-no-dev/ESPAsyncTCP) libary is required.
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### High Level Client API ###
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- `begin` : Initiate connection sequence to the websocket host.
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```
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void begin(const char *host, uint16_t port, const char * url = "/", const char * protocol = "arduino");
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void begin(String host, uint16_t port, String url = "/", String protocol = "arduino");
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```
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- `onEvent`: Callback to handle for websocket events
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```
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void onEvent(WebSocketClientEvent cbEvent);
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```
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- `WebSocketClientEvent`: Handler for websocket events
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```
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void (*WebSocketClientEvent)(WStype_t type, uint8_t * payload, size_t length)
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```
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Where `WStype_t type` is defined as:
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```
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typedef enum {
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WStype_ERROR,
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WStype_DISCONNECTED,
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WStype_CONNECTED,
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WStype_TEXT,
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WStype_BIN,
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WStype_FRAGMENT_TEXT_START,
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WStype_FRAGMENT_BIN_START,
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WStype_FRAGMENT,
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WStype_FRAGMENT_FIN,
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} WStype_t;
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```
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### Issues ###
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Submit issues to: https://github.com/Links2004/arduinoWebSockets/issues
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[](https://gitter.im/Links2004/arduinoWebSockets?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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### License and credits ###
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The library is licensed under [LGPLv2.1](https://github.com/Links2004/arduinoWebSockets/blob/master/LICENSE)
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[libb64](http://libb64.sourceforge.net/) written by Chris Venter. It is distributed under Public Domain see [LICENSE](https://github.com/Links2004/arduinoWebSockets/blob/master/src/libb64/LICENSE).
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