Do it at your own risk.
The below rom(v1.5.0 sdk) is used for this commonly.
http://tskit.co.kr/zbxe/download/3467
ROM v1.1(2015.05.03) : I deleted iot server access routine. - I think it is not necessary for this.
sdk:0.9.4
Thank you for over 100 downloads.(14.12.14)
1. download my firmware.
download mode gpio0 -> gnd
ch_pd : always high
2.use XTCOM_UTIL
open and connect.
first dowload 0x00000.bin
and taget reset
open and connect
second dowload 0x40000.bin
3.Circuit
2015.04 : Added pull-up resistor for gpio2.(booting)
4. Firmware
AP mode
SSID : ESP_XXXXXX
password : 00001111
Server IP : 192.168.4.1
6. demo video
7. Low active mode