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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.
ESP8266 WeMos D1 R2 WiFi Dev Board - Technical Specifications: |
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– ESP8266EX |
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– 3.3V |
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– 11 (with Interrupt, I2C, PWM and One-Wire Capability – Except D0) |
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– 1 (3.2V Max Input) |
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– 4MB |
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– 80MHz / 160MHz |
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– Micro B-Type USB |
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– 9V to 12V |
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– 5V @ 1A Max |
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– 68.6 x 53.4mm |
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.
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 Pin | Function | ESP-8266 Pin |
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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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Espressif Systems have their headquarters based in Shanghai Zhangjiang High-Tech Park, which is considered to be “China’s Silicon Valley”, where they produce low-power WiFi and Bluetooth SoC’s and IoT hardware and software.
Their vision is to enhance the world by leveraging modern technologies like IoT and wireless communications to manufacture products that are more versatile, adaptable and eco-friendly, with the aim of reducing the amount of waste and pollution that the world produces each year. So far, they have been able to reduce the consumption of electrical components by hundreds of thousands of resistors, capacitors, inductors, baluns, switches and power management chips, while reducing the amount of Printed Circuits Boards, or PCB’s, by more than 50,000 square meters.
Espressif is quickly becoming the leading manufacturer of IoT and wireless components, modules and devices that cut out the need for cabling and unnecessary electronics, which will not only result in a world that is cleaner and more environmentally sustainable, but also more adaptable and capable of moving towards the future of human technologies.