The open source LWIP is broken, use espressif's liblwip.a.
Uses system_get_vdd33 instead of readvdd33.
The espressif's sdk0.9.6 beta1 (2015.02.15) release note
1、Optimize smartconfig to version v0.8；
2、Optimize AT to version 0.22.b1；
1>、Fixed bugs；
2>、Optimize the speed of transparent transmission；
3、Optimize boot to version 1.3(b3)；
1>、Fix compatibility problem of dual flash ；
4、Solve problem of the large current in deep sleep；
5、Fixed problem “check mem fail”；
6、Fixed problem of UDP socket may stop listening broadcast packet after a long time running under some special router；
7、Fixed bug related to wifi_station_scan;
8、Other optimize to make the software more reliable；
* dsleep( us, option )
Hardware has to support deep-sleep wake up (XPD_DCDC connects to EXT_RSTB with 0R). system_deep_sleep(0) ，set no wake up timer，connect a GPIO to pin RST, the chip will wake up by a falling-edge on pin RST.
** us: Integer
time to sleep.
if us = 0, it will sleep forever.
** option: Integer
option=0, init data byte 108 is valuable;
option>0, init data byte 108 is valueless.
More details as follows:
0, RF_CAL or not after deep-sleep wake up, depends on init data byte 108.
1, RF_CAL after deep-sleep wake up, there will belarge current.
2, no RF_CAL after deep-sleep wake up, there will only be small current.
4, disable RF after deep-sleep wake up, just like modem sleep, there will be the smallest current.
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Markus Gritsch
Vowstar
HuangRui
alonewolfx2