- Descriptions:

The WeMos D1 mini V2 is minimal ESP8266 wifi board
more: http://www.wemos.cc
https://www.wemos.cc/product/d1-mini.html

• 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
• 1 analog input(3.2V max input)
• a Micro USB connection
• Compatible with Arduino
• Compatible with nodemcu

Tutorial:

• Get started in Arduino

• Get started in NodeMCU

Technical specs

Microcontroller	ESP-8266EX
Operating Voltage	3.3V
Digital I/O Pins	11
Analog Input Pins	1(Max input: 3.2V)
Clock Speed	80MHz/160MHz
Flash	4M bytes
Length	34.2mm
Width	25.6mm
Weight	10g

 

Pin

Pin	Function	ESP-8266 Pin
TX	TXD	TXD
RX	RXD	RXD
A0	Analog input, max 3.3V input	A0
D0	IO	GPIO16
D1	IO, SCL	GPIO5
D2	IO, SDA	GPIO4
D3	IO, 10k Pull-up	GPIO0
D4	IO, 10k Pull-up, BUILTIN_LED	GPIO2
D5	IO, SCK	GPIO14
D6	IO, MISO	GPIO12
D7	IO, MOSI	GPIO13
D8	IO, 10k Pull-down, SS	GPIO15
G	Ground	GND
5V	5V	-
3V3	3.3V	3.3V
RST	Reset	RST

All of the IO pins have interrupt/pwm/I2C/one-wire support except D0

All of the IO pins run at 3.3V.

Driver:

• CH340G USB to UART driver

Useful Links:

• http://www.wemos.cc/Products/d1_mini.html
• ESP8266 wiki: http://www.esp8266.com/wiki/doku.php
  
• Link to GitHub for the arduino IDE instructions and how to install https://github.com/esp8266/Arduino
• ESP8266 Community forum: http://www.esp8266.com/
• ESP8266 LUA (Recomendado): http://www.esp8266.com/wiki/doku.php?id=nodemcu
• Software NodeMCU: https://github.com/nodemcu
• Driver USB: http: www.wch.cn/download/CH341SER_EXE.html
• Instalation driver guid: http: www.instructables.com/id/Instalar-driver-para-CH340G/?ALLSTEPS 
  

- Package Contains:

• Long female pins x 2pcs 
• Short female pins x 2pcs
• Normal pins x 2pcs
• WeMos D1 mini V2 x 1pcs

- Pictures:

 What's new about V2

1. Use BRT (Bias Resistor Transistor), easier into flash mode.

2. 30% increase in radiating area, more stable.