source: rtos_arduino/trunk/arduino_lib/libraries/ESP8266_Arudino_AT/README.md@ 178

@mainpage

# WeeESP8266 updated for Milkcoca SDK

An ESP8266 library for Arduino providing an easy-to-use way to manipulate ESP8266.
Updated to support Milkcoca SDK<>, M0 and TOPPERS/R2CA.

# Source 
Source can be download at <>.
Original source can be download at <https://github.com/itead/ITEADLIB_Arduino_WeeESP8266>.

You can clone it by:

    git clone https://github.com/itead/ITEADLIB_Arduino_WeeESP8266.git

# Documentation

Online API documentation can be reached at <http://docs.iteadstudio.com/ITEADLIB_Arduino_WeeESP8266/index.html>.

Offline API documentation can be found under directory 
[doc](https://github.com/itead/ITEADLIB_Arduino_WeeESP8266/tree/master/doc).

# How to get started

On the home page of API documentation, the tabs of Examples, Classes and Modules 
will be useful for Arduino lovers. 

# API List

    bool        kick (void) : Verify ESP8266 whether live or not.
     
    bool        restart (void) : Restart ESP8266 by "AT+RST".
     
    String      getVersion (void) : Get the version of AT Command Set.
     
    bool        setOprToStation (void) : Set operation mode to staion.
     
    bool        setOprToSoftAP (void) : Set operation mode to softap.
     
    bool        setOprToStationSoftAP (void) : Set operation mode to station + softap.
     
    String      getAPList (void) : Search available AP list and return it.
     
    bool        joinAP (String ssid, String pwd) : Join in AP. 
     
    bool        leaveAP (void) : Leave AP joined before. 
     
    bool        setSoftAPParam (String ssid, String pwd, uint8_t chl=7, uint8_t ecn=4) : Set SoftAP parameters. 
     
    String      getJoinedDeviceIP (void) : Get the IP list of devices connected to SoftAP. 
     
    String      getIPStatus (void) : Get the current status of connection(UDP and TCP). 
     
    String      getLocalIP (void) : Get the IP address of ESP8266. 
     
    bool        enableMUX (void) : Enable IP MUX(multiple connection mode). 
     
    bool        disableMUX (void) : Disable IP MUX(single connection mode). 
     
    bool        createTCP (String addr, uint32_t port) : Create TCP connection in single mode. 
     
    bool        releaseTCP (void) : Release TCP connection in single mode. 
     
    bool        registerUDP (String addr, uint32_t port) : Register UDP port number in single mode. 
     
    bool        unregisterUDP (void) : Unregister UDP port number in single mode. 
     
    bool        createTCP (uint8_t mux_id, String addr, uint32_t port) : Create TCP connection in multiple mode. 
     
    bool        releaseTCP (uint8_t mux_id) : Release TCP connection in multiple mode. 
     
    bool        registerUDP (uint8_t mux_id, String addr, uint32_t port) : Register UDP port number in multiple mode. 
     
    bool        unregisterUDP (uint8_t mux_id) : Unregister UDP port number in multiple mode. 
     
    bool        setTCPServerTimeout (uint32_t timeout=180) : Set the timeout of TCP Server. 
    
    bool        startServer (uint32_t port=333) ： Start Server(Only in multiple mode).

    bool        stopServer (void) : Stop Server(Only in multiple mode).
 
    bool        startTCPServer (uint32_t port=333) : Start TCP Server(Only in multiple mode). 
     
    bool        stopTCPServer (void) : Stop TCP Server(Only in multiple mode). 
     
    bool        send (const uint8_t *buffer, uint32_t len) : Send data based on TCP or UDP builded already in single mode. 
     
    bool        send (uint8_t mux_id, const uint8_t *buffer, uint32_t len) : Send data based on one of TCP or UDP builded already in multiple mode. 
     
    uint32_t    recv (uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from TCP or UDP builded already in single mode. 
     
    uint32_t    recv (uint8_t mux_id, uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from one of TCP or UDP builded already in multiple mode. 
     
    uint32_t    recv (uint8_t *coming_mux_id, uint8_t *buffer, uint32_t buffer_size, uint32_t timeout=1000) : Receive data from all of TCP or UDP builded already in multiple mode. 

# Added API List

    void        begin(SoftwareSerial &uart, uint32_t baud = 115200); : Begin ESP8266.

    void        begin(HardwareSerial &uart, uint32_t baud = 115200); : Begin ESP8266.

    bool        send(String &str); : Send data based on TCP or UDP builded already in single mode. 

    bool        send(uint8_t mux_id, String &str); : Send data based on one of TCP or UDP builded already in multiple mode. 

    int         isdataAvailable(uint8_t mux_id); : Check data is available in multiple mode.

    int         isdataAvailable(void); : Check data is available in single mode.

    int         isConnected(void); : Check connection is opend in single mode.

    int         isConnected(uint8_t mux_id); : Check specific connection is opend in multiple mode.

    int         getMuxCStatus(uint8_t *mux_id_ptn); : Get connection link status.

# Mainboard Requires

  - RAM: not less than 2KBytes
  - Serial: one serial (HardwareSerial or SoftwareSerial) at least 

# Suppported Mainboards
  
  - Arduino UNO and its derivatives
  - Arduino MEGA and its derivatives
  - Arduino M0 and its derivatives
  - [Iteaduino UNO](http://imall.iteadstudio.com/im130312001.html)
  - [WBoard Pro](http://imall.iteadstudio.com/im141125005.html)

# Using SoftwareSerial

If you want to use SoftwareSerial to communicate with ESP8266, you need to modify
the line in file `ESP8266.h`: 

    //#define ESP8266_USE_SOFTWARE_SERIAL

After modification, it should be:

    #define ESP8266_USE_SOFTWARE_SERIAL


# Hardware Connection

WeeESP8266 library only needs an uart for hardware connection. All communications 
are done via uart. In each example, you must specify the uart used by mainboard 
to communicate with ESP8266 flashed AT firmware.

## MEGA and WBoard Pro

For MEGA and WBoard Pro, `Serial1` will be used if you create an object (named wifi) 
of class ESP8266 in your code like this:

    #include "ESP8266.h"
    ESP8266 wifi(Serial1);

The connection should be like these:

    ESP8266_TX->RX1(D19)
    ESP8266_RX->TX1(D18)
    ESP8266_CH_PD->3.3V
    ESP8266_VCC->3.3V
    ESP8266_GND->GND

## UNO

To use SoftwareSerial, `mySerial` will be used if you create an object (named wifi)
of class ESP8266 in your code like this:

    #include "ESP8266.h"
    #include <SoftwareSerial.h>
    
    SoftwareSerial mySerial(3, 2); /* RX:D3, TX:D2 */
    ESP8266 wifi(mySerial);

The connection should be like these:

    ESP8266_TX->RX(D3)
    ESP8266_RX->TX(D2)
    ESP8266_CH_PD->3.3V
    ESP8266_VCC->3.3V
    ESP8266_GND->GND
    
# Attention

The size of data from ESP8266 is too big for arduino sometimes, so the library can't
receive the whole buffer because the size of the hardware serial buffer which is 
defined in HardwareSerial.h is too small.

UNO or MEGA or WBoard Pro
Open the file from `\arduino\hardware\arduino\avr\cores\arduino\HardwareSerial.h`. 

M0
Open the file from `\arduino\hardware\arduino\avr\cores\arduino\RingBuffer.h`. 
See the follow line in the file.

    #define SERIAL_BUFFER_SIZE 64

The default size of the buffer is 64. Change it into a bigger number, like 256 or more.


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