# Shield MicroSD D1 Mini

> The MicroSD D1 Mini shield is a board that attaches to a Wemos D1 Mini via extension pins, adding a slot for Micro SD/Micro SDHC cards, typically up to 32GB. It communicates via SPI, operates at 3.3V, and uses pins D5 (SCK), D6 (MISO), D7 (MOSI), D4 (CS). It supports FAT16/FAT32 file systems and the Arduino SD or SdFat libraries, useful for data or file logging.

- Page: https://sigmanortec.ro/en/shield-microsd-d1-mini
- Price: 8.47 RON
- Availability: In stock; 1-2 zile
- Reference: 33158 · EAN: 5943395391672
- Category: Mechatronics and IoT > Sensors and Modules > Data Storage Module
- Package (shipping data): 0.005 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

Allows quick addition of microSD card storage for Wemos D1 Mini projects, ideal for data logging, files or updates. Communicates via SPI for efficient transfer, operates at 3.3V, supports Micro SD and Micro SDHC up to 32GB, compatible with FAT16/FAT32 file systems and Arduino SD or SdFat libraries.
The Wemos Micro SD Shield is a small printed circuit board (PCB) that attaches to a Wemos D1 Mini via a set of expansion pins. On this PCB, we find a micro SD card slot that accepts micro SD cards of various capacities, usually up to 32 GB or more, depending on the specifications and limitations of the library used. It uses the SPI protocol to communicate with the Wemos board, allowing for high-speed data transfers.
When using this shield, it is important to note that the actual read/write speed may vary depending on the quality of the micro SD card and the software implementation of the SPI stack.
Also, make sure that the libraries and source code are configured properly for specific CS (Chip Select) pins to allow proper communication with the micro SD card.
Specifications:
Compatibility: Wemos D1 Mini and compatible variants
Communication interface: SPI (Serial Peripheral Interface)
Supported card format: Micro SD, Micro SDHC (generally up to 32 GB)
Voltage level: 3.3V
Pins used: D5 (SCK/CLK), D6 (MISO), D7 (MOSI), D4 (CS)
Dimensions: Conforms to Wemos D1 Mini dimensions for stacking compatibility
File system: FAT16/FAT32 (depends on library implementation)
Supported libraries: SdFat, SD (libraries available in the Arduino IDE for file manipulation)