Update to SDK 1.5

[chaeplin]

http://bbs.espressif.com/viewtopic.php?f=46&t=1442

WPA2 Enterprise!!!

Release Notes
Resolved Issues(Bugs below are eligible for Bug Bounty Program):
Returned value of system_get_rst_info is wrong.

Optimization:
Optimize espconn_regist_recvcb for UDP transmission.
Print information will prompt errors if the input parameters of os_time_arm excess the upper limit.
Optimize memory management.
Optimize RF frequency offset.
Print information will prompt errors if the size of bin file is too large in OTA.
Optimize mDNS.
Revise UART output print error when powered on again after call system_uart_swap.
Revise errors during multiple UDP transmissions.
Revise the error when wifi_station_set_config_default is called and the same AP is set as before, while information cannot be stored in the Flash.
Optimize the error of packet loss during UDP transmission process under single station mode.
Add new function, WPA2-Enterprise is supported.
SmartConfig version is upgraded to V2.5.3.
Mesh version is upgraded to V0.2.3.
User application needs to add "-lcrypto" in 'LINKFLAGS_eagle.app.v6" area of Makefile.

Added APIs:
espconn_abort: break TCP connection compulsively.
espconn_secure_delete: delete the SSL server when ESP8266 runs as SSL server.
wifi_station_set_cert_key: set certificate and private key for WPA2 Enterprise.
wifi_station_clear_cert_key: release the resouce of connecting to WPA2 Enterprise AP, and clear the status.

[alltheblinkythings]

FYI, there's a SDK patch for liblwip.a, fixes a bug in espconn_abort(). http://bbs.espressif.com/viewtopic.php?f=46&t=1527:

[SDK Patch] espconn_abort issue on ESP8266_NONOS_SDK_V1.5.0

Here is a patch based on ESP8266_NONOS_SDK_V1.5.0 solved a problem that calling espconn_abort may cause unexpected reset.

Don't think we use that API yet, but mentioning in case it becomes important later on.

[blensonpaul]

Anyone with EAP/TTLS Radius authorisation example code? Thanks

[joostd]

Version 1.5.1 of the SDK is released:
http://bbs.espressif.com/viewtopic.php?f=46&t=1609

For WPA2-Enterprise (EAP-TTLS) this is an important update, as libwpa2 now contains a function wifi_station_set_username that will set the username (that defaults to "Espressif").