Specifications:

802.11b/g/n Wi-Fi SOC
Integrated Tensilica L106 ultra-low-power 32-bit micro MCU, run at 80 MHz and 160 MHz frequency, supports RTOS
Built-in 1-ch 10 bit high precision ADC
Supports UART/GPIO/ADC/PWM/I2C
SMD22 package
Integrated Wi-Fi MAC/ BB/RF/PA/LNA
Supports multi sleep modes, deep sleep current as low as 20uA
UART baudrate up to 4Mbps
Embedded Lwip protocol stack
Supports STA/AP/STA AP operation mode
Supports Smart Config (APP) / AirKiss (WeChat), one key networking
Supports UART local firmware upgrade and/or remote firmware upgrade (FOTA)
AT commands for getting started fast
Supports secondary development, integrated Windows / Linux environment