Features

• 11 digital input/output pins
• Interrupt/pwm/I2C/one-wire
• 1 analog input(3.2V max input)
• 16M bytes(128M bit) Flash
• External antenna connector
• Built-in ceramic antenna
• New CP2104 USB-TO-UART IC
• Same size as D1 mini, but more light

Tutorial:

• Get started in Arduino： https://www.wemos.cc/tutorial/get-started-arduino.html
  

• Get started in NodeMCU： https://www.wemos.cc/tutorial/get-started-nodemcu.html
  

   

  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	16M bytes
  Length	34.2mm
  Width	25.6mm
  Weight	2.5g

   

  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:

• CP2104 USB to UART driver: https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx

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

Top view:

Bottom view:

WeMOS D1 mini Pro VS WeMOS mini V2:

Shipping list: