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# NNN40 WI-FI SDK version 20151021, release at 2015/10/21
This is the export repo for the WIFI_API provided by Delta Electronics, Inc.

# Highlight of this release
* Add receive_all packet buffering used for Websocket.recv

# Major supported features
* Set TCP maximum payload to 1400 bytes (Max. throughput achieve ~7.5KB)
* Set UDP maximum payload to 1400 bytes (Max. throughput achieve ~20KB)
* Support DNS client for TCP/UDP
* Fast AP re-connection is performed automatically, user can call EthernetInterface.disconnect() to have lowest power consumption of 4uA, then call init and connected to previous AP for less than 4 sec

# Roadmap
* Support BLE and WIFI coexistence
* Support light weight SSL (modified from CyaSSL)

# Supported functionalities of embeded Wi-Fi chipset
Currently supported  functionalities include:
* IEEE 802.11 b/g/n connectivity
* Station (STA) infrastructure mode
* Soft AP mode with DHCP server, user must DnD SoftAP_FW_update.hex to DELTA folder to update internal flash (only need to perform once)
* WEP/WPA/WPA2 security
* DHCP Client and Static IPv4 addressing
* TCP Server/Client
* UDP Server/Client
* WIFI BLE coexistence 

# Getting Started 
This WIFI API is meant to be used on Delta NNN40 EVB. 
A good starting point are these pages:
* [WI-FI SDK User Guide](document come with WI-FI SDK deliver) for system overview, APIs summary and sample code
* [EthernetInterface - Handbook](http://developer.mbed.org/handbook/Ethernet-Interface) a simple API that you will need to connect to the internet.
* [Socket - Handbook](http://developer.mbed.org/handbook/Socket) a simple and consistent way to communicate using bsd-like TCP and UDP sockets over WI-FI