WeMos D1 Uno R32 WiFi ESP32-WROOM-32 4MB Shield for Arduino ESP32

WeMos D1 Uno R32 WiFi ESP32-WROOM-32 4MB Shield for Arduino ESP32

A high-performance development board equipped with a Dual Core Xtensa 32-bit LX6 microcontroller, providing CPU clock speeds from 80 to 240 MHz. The module operates at 3.3 V on its I/O pins, while the entire board can be powered over a wide range of 5 - 12 V. The device offers 520 kB of SRAM and 4 MB of Flash memory, enabling advanced projects. The integrated WiFi 802.11 b/g/n HT40 and Bluetooth BLE modules provide broad wireless connectivity, supported by advanced security standards (including WPA/WPA2, AES, RSA-4096).

The board exposes 21 GPIO pins supporting popular interfaces such as UART, SPI, and I2C. It also includes a built-in USB-UART CH340C converter, which greatly simplifies programming and communication with a PC via a microUSB connector. Compact dimensions and a standard DC 5.5 x 2.1 mm power jack make this module a versatile solution for Arduino and ESP32 projects.

Key technical features

• Microcontroller: Dual Core Xtensa 32-bit LX6 (clock 80 - 240 MHz)
• Memory: 520 kB SRAM and 4 MB Flash
• Wireless: WiFi 802.11 b/g/n HT40 and Bluetooth BLE
• Interfaces: 2x UART, 1x SPI, 1x I2C, PWM outputs
• Converters: 12-channel ADC and 2-channel DAC
• Programmer: built-in CH340C (microUSB connector)

Example applications

• Home automation (Smart Home) and Internet of Things (IoT) systems
• Wireless weather stations and environmental sensors
• Educational projects and electronic prototyping
• LED lighting and small motor controllers
• Network gateways and web servers on microcontrollers

Benefits

• High computing performance thanks to the dual-core processor
• Easy programming thanks to the built-in USB-UART converter
• Broad wireless connectivity (WiFi and Bluetooth in one)
• Compatibility with popular development environments (Arduino, ESP32)
• Convenient power via DC jack or microUSB port

Technical specification

• Supply voltage: 5 - 12 V
• I/O operating voltage: 3.3 V
• Max I/O port voltage: 3.3 V
• Microcontroller: Dual Core Xtensa 32-bit LX6
• CPU clock: 80 - 240 MHz
• SRAM: 520 kB
• Flash memory: 4 MB
• Built-in WiFi 802.11 b/g/n HT40
• WiFi security: WEP, WPA/WPA2, PSK/Enterprise, AES / SHA2 / Elliptical Curve Cryptography / RSA-4096
• Built-in Bluetooth BLE module
• 21 GPIO pins including: 2x UART, 1x SPI, 1x I2C
• 12-channel ADC
• 2-channel DAC
• PWM outputs
• Built-in USB-UART CH340C (communication and programming via microUSB)
• Power connector: DC 5.5 x 2.1 mm
• Board dimensions: 68 mm x 53 mm x 12 mm