Project44.SD Card Info

Description

Specification

Product weight: 10g Product color: blue. Power supply voltage: 3.3,5V two voltages.

Connect

_images/44_bb.png

Code

#include <SPI.h>
#include <SD.h>

File myFile;


void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);

while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
}

Serial.print("Initializing SD card...");

if(!SD.begin(4)){
    Serial.println("Initializing failed!");
    while(1);
}
Serial.println("Initializing done.");

if(SD.exists("example.txt")){
    Serial.println("example.txt exits.");
}else{
    Serial.println("example.txt doesn't exist.");
}

Serial.println("Creating example.txt...");
myFile = SD.open("example.txt", FILE_WRITE);
myFile.write("Hello");
Serial.println("Writing to file successful");
myFile.close();
}

void loop(){

}

Phenomenon