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Wemos D1 R2 ESP8266 WiFi UNO Development Board with USB port, ESP8266 module, and pin headers
nodemcu esp8266 module section on Wemos D1 R2 board showing WiFi chip and antenna area
esp8266 wifi module components on Wemos D1 R2 board with GPIO headers and layout details
Wemos D1 R2 ESP8266 board backside with PCB traces, solder pads, and connector points
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Wemos D1 R2 ESP8266 WiFi UNO Development Board with USB port, ESP8266 module, and pin headers
nodemcu esp8266 module section on Wemos D1 R2 board showing WiFi chip and antenna area
esp8266 wifi module components on Wemos D1 R2 board with GPIO headers and layout details
Wemos D1 R2 ESP8266 board backside with PCB traces, solder pads, and connector points

Wemos D1 R2 ESP8266 WiFi UNO Development Board

(7 customer reviews)
SKU: DEV-AB004

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Original price was: ₹384.00.Current price is: ₹315.00. (Inc. GST)

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  • Wemos D1 board integrates ESP8266 WiFi in an Arduino UNO form factor
  • 4MB Flash memory supports large IoT firmware and OTA updates
  • Provides 11 digital I/O pins with PWM, I2C, and interrupt support
  • Compatible with ESP8266 libraries and Arduino IDE development environment
  • Supports 9V to 12V input with regulated 5V 1A output capability
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Description

The Wemos D1 R2 ESP8266 WiFi UNO Development Board combines the ESP8266 WiFi microcontroller with an Arduino UNO-compatible form factor, giving builders a WiFi-capable board that accepts standard Arduino UNO shields and uses familiar Arduino IDE programming. The wemos d1 carries 4MB of flash memory, 11 digital I/O pins with PWM, I2C, and interrupt support, and one analog input pin rated to a maximum of 3.2V. Input accepts 9V to 12V with an onboard regulator supplying 5V at 1A for shield and peripheral power.

The nodemcu esp8266 library ecosystem applies directly to this board — all ESP8266 Arduino libraries, WiFi server examples, MQTT clients, and OTA update sketches written for NodeMCU work without modification on the Wemos D1 R2. One limitation to note: the analog input pin accepts a maximum of 3.2V, not the 5V of standard Arduino UNO analog pins. Using 5V analog sensors without a voltage divider will damage the ADC permanently. The non-obvious advantage of the UNO form factor over NodeMCU is physical shield compatibility — standard Arduino motor shields, relay shields, and display shields mount directly without jumper wires.

The esp8266 wifi module format of this board is widely used by Indian engineering students for WiFi home automation, IoT sensor dashboards, and ESP8266 web server projects.

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Features:

  • ESP8266 WiFi microcontroller in Arduino UNO compatible PCB form factor
  • 4MB flash supports large firmware builds and OTA wireless update capability
  • 11 digital I/O with PWM I2C and interrupt for full peripheral support
  • Onboard regulator outputs 5V at 1A for Arduino shield power supply
  • NodeMCU ESP8266 library compatible — no code changes needed from NodeMCU

Technical Specifications:

Specification Details
Microcontroller ESP8266
Operating Voltage 3.3 V
Digital I/O Pins 11 (PWM / I2C / Interrupt)
Analog Input Pins 1 (Max 3.2 V)
Flash Memory 4 MB
Input Voltage Range 9 V to 12 V
Output 5 V at 1 A Max
Compatibility Compatible with NodeMCU ESP8266

Applications:

  • Wemos D1 R2 ESP8266 WiFi UNO Board used for IoT home automation
  • College project uses wemos esp8266 for WiFi sensor data dashboard build
  • ESP8266 web server project uses wemos d1 board for HTTP control
  • Engineering lab uses nodemcu esp8266 compatible board for MQTT IoT demo
  • Smart home project uses esp8266 pinout compatible wemos board for relay

Package Includes:

  • 1 x Wemos D1 R2 ESP8266 WiFi UNO Development Board
How Long Does Delivery Take?

We know you want your order as fast as possible so we do our best to get it out as fast as possible. Most orders are packed and shipped within 12 hours of order confirmation. Delivery is usually 3-7 business days depending on your location. Orders in big cities tend to arrive faster, but delivery to remote areas might take a bit longer. When your order is shipped we will send you tracking details via WhatsApp. This allows you to follow your order all the way to your doorstep.

2. What should I do if I receive a damaged product?

If your order is damaged or defective, please contact us within 24 hours of delivery. Best bet is to record an unboxing video before you open the package. This is the fastest way for us to get an idea of what went wrong and get things moving on our end.
We will check the video and then do what we can to get you a replacement ASAP.

3. Do you provide technical support for products?

Yes, STEMVOLT provides basic technical support for most DIY kits, sensors, and electronic components to help you use the product smoothly and without confusion.

4. Is payment on STEMVOLT secure?

Yes, all payments on STEMVOLT are processed through secure and encrypted payment gateways. Your personal and payment information remains completely safe and protected at all times.

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Customer Reviews

4.4
7 reviews
3
4
0
0
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7 reviews for Wemos D1 R2 ESP8266 WiFi UNO Development Board

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  1. Satish Rathi –

    Received this board with prompt delivery and damage proof packing, setup was easy and expert guidance helped during configuration.

  2. Pranav Kulkarni –

    First order satisfied

  3. Nitesh Chhabra –

    Excellent IoT development board

  4. Riya Bhandari –

    Value for money

  5. Arjun Mathur –

    Fully compatible with the arduino, making programming and development simple for beginners and experts

  6. Manish Kesarwani –

    Bought from a trusted educational store in Rajasthan for an arduino project, board quality feels excellent and easy checkout process made ordering convenient.

  7. Vikram Paliwal –

    Suitable for IoT and cloud-based applications with stable WiFi connectivity and reliable performance

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