70 lines
1.8 KiB
ReStructuredText
70 lines
1.8 KiB
ReStructuredText
ESP WebSocket Client
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====================
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Overview
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--------
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The ESP WebSocket client is an implementation of `WebSocket protocol client <https://tools.ietf.org/html/rfc6455>`_ for ESP32
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Features
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--------
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* supports WebSocket over TCP, SSL with mbedtls
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* Easy to setup with URI
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* Multiple instances (Multiple clients in one application)
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Configuration
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-------------
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URI
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^^^
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- Supports ``ws``, ``wss`` schemes
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- WebSocket samples:
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- ``ws://websocket.org``: WebSocket over TCP, default port 80
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- ``wss://websocket.org``: WebSocket over SSL, default port 443
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- Minimal configurations:
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.. code:: c
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const esp_websocket_client_config_t ws_cfg = {
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.uri = "ws://websocket.org",
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};
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- If there are any options related to the URI in
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``esp_websocket_client_config_t``, the option defined by the URI will be
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overridden. Sample:
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.. code:: c
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const esp_websocket_client_config_t ws_cfg = {
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.uri = "ws://websocket.org:123",
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.port = 4567,
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};
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//WebSocket client will connect to websocket.org using port 4567
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SSL
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^^^
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- Get certificate from server, example: ``websocket.org``
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``openssl s_client -showcerts -connect websocket.org:443 </dev/null 2>/dev/null|openssl x509 -outform PEM >websocket_org.pem``
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- Configuration:
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.. code:: cpp
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const esp_websocket_client_config_t ws_cfg = {
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.uri = "wss://websocket.org",
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.cert_pem = (const char *)websocket_org_pem_start,
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};
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For more options on ``esp_websocket_client_config_t``, please refer to API reference below
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Application Example
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-------------------
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Simple WebSocket example that uses esp_websocket_client to establish a websocket connection and send/receive data with the `websocket.org <https://websocket.org>`_ Server: :example:`protocols/websocket`.
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API Reference
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-------------
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.. include:: /_build/inc/esp_websocket_client.inc
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