Description:
WIFI Kit 8 is a cost-effective Internet of things development program , the main chip using ESP8266, with CP2014 USB to serial chip, lithium battery interface and charge and discharge circuit, 32MByte Flash, WIFI antenna, 0.91-inch OLED display
It can be programmed in Arduino and NodeMCU environments

Main chip:esp8266
12 digital pins can read, write, IIC, SPI, the middle, PWM and other functions
1 AD input
OLED size and color:0.91 oled white
Working voltage: 3.3V ~ 7V

Document link: http://www.diymalls.com/files/FZ2835-FZ2836-FZ2837-ESP32-ESP8266.zip

Document link  https://drive.google.com/open?id=0B8DSGdAr8_31d19WQmN6SE1fLVE (亚马逊用）
 
Package Includes:
1 X 0.91 OLED ESP8266 Wifi Kit8 Development Board
2 X Pin headers