ESP8266 WiFi NodeMCU module integrated with a 0.96" OLED display.

This is a low cost Arduino-compatible ESP8266 development board. A 0.96" OLED display is on the board. It is very easy for beginners. You can program it like Arduino. There is a project support for ESP8266 chip to the Arduino environment: Arduino core for ESP8266 WiFi chip. Another famous project is NodeMCU, which you can use LUA to control ESP8266.

Specifications:

• All ESP8266 pins broken out.
  
• 12 digital pins write/read/interrupt/pwm/I2C/one-wire supported(except D0)
  
• 1 analog input
  
• Integrated 0.96 Prime; OLED
  
• Micro USB connection
  
• Compatible with Arduino
  
• Compatible with NodeMCU(Lua for ESP8266)
  
• Input Power 4.75V ~ 12V