The TF WiFi Micro SD Card Reader Module is an expansion board designed specifically for the D1 Mini (ESP8266) development board. It allows you to interface a microSD (TF) card with your D1 Mini over SPI, making it easy to store and retrieve data such as logs, files, or images in IoT and web-connected projects.

Key Features:

✔ Compatible with D1 Mini: Plug-and-play support for the popular ESP8266 D1 Mini board
✔ Supports Micro SD (TF) Cards: Standard card slot for up to 32GB (FAT16/FAT32)
✔ Communication Interface: Uses SPI (MISO, MOSI, SCK, CS) for fast data transfer
✔ 3.3V Logic Compatible: Safe for direct connection to ESP8266 without level shifters
✔ Compact Size: Stackable design with matching D1 Mini form factor
✔ Onboard Pull-Up Resistors: Ensures stable SPI communication

Applications:

🔹 IoT data logging and storage
🔹 Web server file hosting on ESP8266
🔹 Image/audio/text storage for WiFi-connected devices
🔹 SD-based configuration or firmware update systems
🔹 Projects that require offline storage or buffering