Description:
Full IO interfaceleads, supports AT and internal ESP8266 to direct product development
Shielded case,stable
Support 3-way PWM 6-way IO AD and one high-speed UART
After the firmware upgrade, you can use the phone or PC to control the PWM IO or UART directly, it does not need external MCU
The test board can be used to upgrade

Use:
Stability testing of ESP-12E
As the smallest low-cost system for learning, can develop AT command or SDK download

Reference links:
http://www.instructables.com/id/ESP8266-ESP-12Standalone-Blynk-101/

https://github.com/esp8266/Arduino

http://www.xess.com/blog/esp8266-reflash/

Package Included:
1 X ESP8266-12 Wifi Evaluation Board
1 X ESP-12E
1 X AA Battery Holder