Specification:
- Main Chip: ESP8266 CH340G.
- WIFI Development Board, 4M bytes.
- supported (except D0).
- Support OTA on line.
- 1 Micro USB connection.
- 1 analog input (3.3V max input).
- 5V 1A switching power supply onboard.
- 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire and a micro-USB connection.

How to get it started in for Arduino:
A: Setup driver
Before you use mini D1 boards, you need set up CH340g driver.
B: Python
On Windows you need install Python 2.7.10.
On Linux & MAC OSX, you don't need install it, comes preinstalled with OS.
C: Installing Hardware package "Boards Manager or GIT".

Selecting the board for your sketch:
1. Go to Tools --> Board and select either “LOLIN(WEMOS) D1 R2 & mini” or "NodeMCU 1.0 (12-E Module)" — either of these worked for me
2. Be sure to select which COM port the board from Tools -> Port
3. Check that the upload rate is 115200 (it should already be)

Note:
We recommend that you can use GIT, then always get the latest version

Package included:
4pcs D1 Mini NodeMcu Lua WLAN WIFI Internet Development Board.