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esp8266/doc/esp8266wifi/client-class.rst
standby24x7 683b8e606c
Fix spelling typos in files under doc/esp8266wifi (#7520)
This patch fixes some spelling typos in following files
bearssl-client-secure-class.rst
client-class.rst
scan-class.rst
scan-examples.rst
server-examples.rst
2020-08-12 08:28:22 -07:00

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Client Class
------------
Methods documented for `Client <https://www.arduino.cc/en/Reference/WiFiClientConstructor>`__ in `Arduino <https://github.com/arduino/Arduino>`__
1. `WiFiClient() <https://www.arduino.cc/en/Reference/WiFiClient>`__
2. `connected() <https://www.arduino.cc/en/Reference/WiFiClientConnected>`__
3. `connect() <https://www.arduino.cc/en/Reference/WiFiClientConnect>`__
4. `write() <https://www.arduino.cc/en/Reference/WiFiClientWrite>`__
5. `print() <https://www.arduino.cc/en/Reference/WiFiClientPrint>`__
6. `println() <https://www.arduino.cc/en/Reference/WiFiClientPrintln>`__
7. `available() <https://www.arduino.cc/en/Reference/WiFiClientAvailable>`__
8. `read() <https://www.arduino.cc/en/Reference/WiFiClientRead>`__
9. `flush() <https://www.arduino.cc/en/Reference/WiFiClientFlush>`__
10. `stop() <https://www.arduino.cc/en/Reference/WiFIClientStop>`__
Methods and properties described further down are specific to ESP8266. They are not covered in `Arduino WiFi library <https://www.arduino.cc/en/Reference/WiFi>`__ documentation. Before they are fully documented please refer to information below.
flush and stop
~~~~~~~~~~~~~~
``flush(timeoutMs)`` and ``stop(timeoutMs)`` both have now an optional argument: ``timeout`` in millisecond, and both return a boolean.
Default input value 0 means that effective value is left at the discretion of the implementer.
``flush()`` returning ``true`` indicates that output data have effectively been sent, and ``false`` that a timeout has occurred.
``stop()`` returns ``false`` in case of an issue when closing the client (for instance a timed-out ``flush``). Depending on implementation, its parameter can be passed to ``flush()``.
setNoDelay
~~~~~~~~~~
.. code:: cpp
setNoDelay(nodelay)
With ``nodelay`` set to ``true``, this function will to disable `Nagle algorithm <https://en.wikipedia.org/wiki/Nagle%27s_algorithm>`__.
This algorithm is intended to reduce TCP/IP traffic of small packets sent over the network by combining a number of small outgoing messages, and sending them all at once. The downside of such approach is effectively delaying individual messages until a big enough packet is assembled.
*Example:*
.. code:: cpp
client.setNoDelay(true);
getNoDelay
~~~~~~~~~~
Returns whether NoDelay is enabled or not for the current connection.
setSync
~~~~~~~
This is an experimental API that will set the client in synchronized mode.
In this mode, every ``write()`` is flushed. It means that after a call to
``write()``, data are ensured to be received where they went sent to (that is
``flush`` semantic).
When set to ``true`` in ``WiFiClient`` implementation,
- It slows down transfers, and implicitly disable the Nagle algorithm.
- It also allows to avoid a temporary copy of data that otherwise consumes
at most ``TCP_SND_BUF`` = (2 * ``MSS``) bytes per connection,
getSync
~~~~~~~
Returns whether Sync is enabled or not for the current connection.
setDefaultNoDelay and setDefaultSync
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
These set the default value for both ``setSync`` and ``setNoDelay`` for
every future instance of ``WiFiClient`` (including those coming from
``WiFiServer.available()`` by default).
Default values are false for both ``NoDelay`` and ``Sync``.
This means that Nagle is enabled by default *for all new connections*.
getDefaultNoDelay and getDefaultSync
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Return the values to be used as default for NoDelay and Sync for all future connections.
Other Function Calls
~~~~~~~~~~~~~~~~~~~~
.. code:: cpp
uint8_t status ()
virtual size_t write (const uint8_t *buf, size_t size)
size_t write_P (PGM_P buf, size_t size)
size_t write (Stream &stream)
size_t write (Stream &stream, size_t unitSize) __attribute__((deprecated))
virtual int read (uint8_t *buf, size_t size)
virtual int peek ()
virtual size_t peekBytes (uint8_t *buffer, size_t length)
size_t peekBytes (char *buffer, size_t length)
virtual operator bool ()
IPAddress remoteIP ()
uint16_t remotePort ()
IPAddress localIP ()
uint16_t localPort ()
Documentation for the above functions is not yet available.