I used the AT command "AT+CIUPDATE" to update it from the cloud. When I sent "AT+GMR" command, I got following reply from esp
AT+GMR
AT version:0.30.0.0(Jul 3 2015 19:35:49)
SDK version:1.2.0
Ai-Thinker Technology Co.,Ltd.
Build:1.2.0.A Aug 7 2015 17:21:44
OK
I have question though, which is the latest firmware? What's the different between the firmware in my esp with the one used for flashing (http://www.electrodragon.com/w/ESP8266_firmware_flasher)? I'm wondering why there are lot of firmware flashing details spread over internet. The firmware flashers and automatic firmware-cloud-update confuses me which one to use.