WEMOS D1 Mini V4.0.0 Highlighted Features:
- Digital Versatility: Boasts 11 digital input/output pins. Every pin is equipped with interrupt, PWM, I2C, and one-wire functionalities, with the sole exception of D0.
- Analogue Input: One dedicated analogue input with a 3.2V maximum intake.
- Connectivity: A modern Type-C USB port and a dedicated I2C port ensure seamless connections.
- Broad Compatibility: Effortlessly integrates with MicroPython, Arduino, and NodeMCU, offering a diverse programming environment.
- Expandability: Comes with a plethora of shields, allowing you to enhance its functionalities as per your project’s needs.
Specifications at a Glance for WEMOS D1 Mini V4.0.0:
- Operating Voltage: 3.3V
- Clock Speed: Dynamic 80/160MHz
- Onboard Memory: 4MB Flash Memory
- Compact Design: Dimensions of 34.2 x 25.6mm and a mere weight of 3g.
- I2C Port: Ensures efficient data communication.
- Energy Efficient: Known for its minimal power consumption, it’s perfect for projects where energy efficiency is paramount.
- Shields Support: The board supports a myriad of shields
This sleek and efficient board, based on the ESP8266 WiFi chip, is tailored for the modern-day tech enthusiast. Whether you’re a seasoned developer or just starting out, the WEMOS D1 Mini V4.0.0 is designed to elevate your IoT projects to new heights.

ESP8266 WiFi Chip Performance
The WEMOS D1 Mini V4.0.0 runs on the proven ESP8266 WiFi microcontroller, delivering reliable wireless connectivity for IoT applications. With 4MB flash memory and adjustable clock speeds of 80MHz or 160MHz, this development board handles complex programming tasks while maintaining low power consumption. The 3.3V operating voltage and compact 34.2 x 25.6mm footprint make it suitable for space-constrained projects.
Programming and Development Options
Compatible with Arduino IDE, MicroPython, and NodeMCU firmware, the D1 Mini V4.0.0 supports multiple programming environments. The Type-C USB connection simplifies programming and power delivery. All 11 digital I/O pins support PWM, interrupt, I2C, and one-wire protocols (except D0), providing flexibility for sensor integration and peripheral control. The single analogue input accepts up to 3.2V for reading sensor data.
Shield Expansion System
The WEMOS D1 Mini ecosystem includes numerous shields for expanding functionality. The dedicated I2C port facilitates communication with displays, sensors, and other modules. At just 3 grams, the board maintains portability while supporting stackable shields for prototyping and project development.




















