Introduzione
This manual provides detailed instructions for the DAOKAI Micro SD Card Reader Module. This module is designed to facilitate reading and writing to MicroSD cards in SCM (Single-Chip Microcomputer) systems, particularly for Arduino projects, utilizing the SPI interface.
Contenuto della confezione
Dopo aver aperto la confezione, verifica che siano inclusi tutti i seguenti articoli:
- 5 x Micro SD Card Adapter Modules
- 30 x Female to Male Dupont Cables
Specifiche
The DAOKAI Micro SD Card Reader Module features the following technical specifications:
- Voltage: 4.5V ~ 5.5V CC
- Attuale: 0.2 ~ 200mA
- Interfaccia di comunicazione: Standard SPI Interface
- Vol. interfacciatage Livello: 3.3V o 5V
- Applicable Card Types: Micro SD Card (less than 2GB), Micro SDHC Card (less than 32GB)
- Dimensioni: 17.9 mm x 17.9 mm (0.7 pollici x 0.7 pollici)
- Montaggio: Two M2 screw positioning holes with a diameter of 2.2mm for easy installation.

Image: Detailed specifications of the Micro SD card module.

Image: Physical dimensions of the Micro SD card module.
Guida all'installazione
To integrate the Micro SD Card Reader Module into your project, follow these connection guidelines:
- Control Interface Pins: The module features a standard SPI control interface with the following pins:
- TERRA: Collega a terra.
- 3V3: Alimentazione (3.3V).
- MISO: Master In Slave Out (SPI bus).
- MOSI: Master Out Slave In (SPI bus).
- CL: Clock (SPI bus).
- Servizio clienti: Chip Select signal pin.
- Alimentazione elettrica: Ensure the module receives a stable DC voltage between 4.5V and 5.5V. The interface voltage level can be 3.3V or 5V, depending on your microcontroller.
- Compatibilità Arduino: For Arduino users, the module is directly compatible with the Arduino IDE's built-in SD Card library. This library simplifies card initialization and read/write operations.

Image: Pinout diagram of the Micro SD card module.

Immagine: Example wiring for the Micro SD card module with a microcontroller.
Istruzioni per l'uso
Once the module is correctly set up and connected to your microcontroller, you can perform read and write operations on MicroSD cards. The module supports Micro SD cards up to 2GB and Micro SDHC cards up to 32GB.
- Inserire la scheda MicroSD: Gently insert a compatible MicroSD or Micro SDHC card into the module's slot until it clicks into place.
- Inizializzazione: Use your microcontroller's programming environment (e.g., Arduino IDE with the SD Card library) to initialize the card. This typically involves calling a function to set up the SPI communication and detect the card.
- Operazioni di lettura/scrittura: After successful initialization, you can use the provided library functions to read data from files on the card, write data to new or existing files, and manage directories.
- Eject Card: To remove the card, gently push it further into the slot until it springs out. Always ensure no read/write operations are active before removing the card to prevent data corruption.

Image: Micro SD card module performing read and write operations.
Manutenzione
To ensure the longevity and optimal performance of your Micro SD Card Reader Module, consider the following maintenance tips:
- Mantenere asciutto: Evitare di esporre il modulo all'umidità o ai liquidi, poiché ciò potrebbe causare cortocircuiti e danni.
- Maneggiare con cura: The module contains sensitive electronic components. Avoid dropping it or subjecting it to strong impacts.
- Pulizia: Keep the module free from dust and debris. Use a soft, dry brush or compressed air to clean if necessary. Do not use harsh chemicals.
- Magazzinaggio: When not in use, store the module in a dry, anti-static environment.
Risoluzione dei problemi
If you encounter issues with your Micro SD Card Reader Module, try the following troubleshooting steps:
- No Card Detected:
- Ensure the MicroSD card is fully inserted and clicked into place.
- Verify the card type is compatible (Micro SD <2GB or Micro SDHC <32GB).
- Check your code for correct card initialization.
- Errori di lettura/scrittura:
- Confirm all wiring connections (GND, 3V3, MISO, MOSI, CLK, CS) are secure and correctly oriented. Incorrect wiring, especially reversed power, can damage the module or connected devices.
- Garantire l'alimentazione voltage rientra nell'intervallo specificato (4.5 V-5.5 V CC).
- Try a different MicroSD card to rule out card-related issues.
- Verify the interface voltage level (3.3V or 5V) matches your microcontroller's requirements.
- Il modulo non si accende:
- Check the power connections (GND and 3V3) for continuity and correct voltage.
- Ensure your power source is providing sufficient current (0.2-200mA).
Garanzia e supporto
For warranty information or technical support regarding your DAOKAI Micro SD Card Reader Module, please refer to the purchase documentation or contact DAOKAI customer service directly through the retailer where the product was purchased. Please have your model number (WE-DA-063) and purchase date available when contacting support.