ESP8266 WeMos D1 R2 WiFi Dev Board | Arduino UNO-Footprint Expand

ESP8266 WeMos D1 R2 WiFi Dev Board

9DEVWEMOSD1R2

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The Wemos D1 R2 is a WiFi capable ESP8266EX based development board in the form of the common Arduino UNO board format. This board is compatible with the Arduino IDE and with NodeMCU. The D1 R2 also features an on-board switching power supply which allows you to power the board from a supply of up to 12V.

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As an electronics enthusiast, then you will have probably heard of the ESP8266 WeMos D1 R2 WiFi Dev Board and all of the fantastic projects that can be accomplished with it. However, if you haven’t heard about it before, you may be pleasantly surprised with this great development board, which has been designed to the same format as the classic Arduino UNO, but offers slightly better features in a few different ways.

Designed to almost replicate the power of an Arduino UNO, the WeMos D1 R2 features a larger flash memory, onboard WiFi capabilities, and a few minor improvements that make it a bit more versatile and easier to use. It is also natively compatible with many of the Arduino Shields that fit the UNO, even further adding to the convenience and versatility of this inexpensive but advanced microcontroller board.

Please Note: The D1 R2 is a 3.3V device. If you connect it to 5V digital sensors or devices you may need a logic level converter to convert the signals as they travel between different components.

Technical Specifications:

  • Microcontroller

– ESP8266EX

  • Operating Voltage

– 3.3V

  • Digital I/O Pins

– 11 (with Interrupt, I2C, PWM and One-Wire Capability – Except D0)

  • Analog Input Pins

– 1 (3.2V Max Input)

  • Flash Memory

– 4MB

  • Clock Speed

– 80MHz / 160MHz

  • Connection Type

– Micro B-Type USB

  • On-Board PSU Voltage

– 9V to 12V

  • On-Board PSU Output

– 5V @ 1A Max

  • Board Dimensions

– 68.6 x 53.4mm

 

Typical Applications for the ESP8266 WeMos D1 R2 WiFi Dev Board:

Thanks to the sheer versatility and clever design of the ESP8266 WeMos D1 R2 WiFi Dev Board, it can be used for an incredibly wide range of different projects. It offers very similar, albeit slightly better, features to the Arduino UNO Board, while integrating onboard WiFi capabilities and offering both Arduino IDE and NodeMCU compatibility. Additionally, there is a massive supply of libraries and resources available online if you’re willing to take a bit of time to look for them, and the widespread popularity of this board has ensured that there will always be someone (or many, in fact) who will be willing to help you build that project you’ve always wanted to make.

 

Additional Resources:

You will need to install a driver for your computer to recognize the on-board CH340G USB to serial converter.

If you are using Codebender online you do not need to install a driver.

ALL OF THE I/O PINS HAVE INTERRUPT/PWM/I2C/ONE-WIRE CAPABILITY, EXCEPT FOR D0

WeMos D1 R2 PIN Layout:

Board PinFunctionESP-8266 Pin
TX TXD TXD
RX RXD RXD
A0 Analog input (3.3V max) A0
D0 I/O GPIO16
D1 I/O, SCL GPIO5
D2 I/O, SDA GPIO4
D3 I/O, 10k pull-up GPIO0
D4 I/O, 10k pull-up, BUILTIN_LED GPIO2
D5 I/O, SCK GPIO14
D6 I/O, MISO GPIO12
D7 I/O, MOSI GPIO13
D8 I/O, 10k pull-down, SS GPIO15
GND Ground GND
5V 5V -
3V3 3.3V 3.3V
RST Reset RST

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ESP8266 WeMos D1 R2 WiFi Dev Board

ESP8266 WeMos D1 R2 WiFi Dev Board