Arduino SD.exists()
Description
- The SD.exists() function checks if a directory or file exists or not on the SD card.
Syntax
SD.exists(directory)
SD.exists(filename)
Parameters
- directory: the name of the directory to check for existence, which can include parent directories (delimited by forward-slashes, /). Allowed type: const char array
- filename: the name of the file to check for existence, which can include directories (delimited by forward-slashes, /). Allowed type: const char array
Returns
- true if the file or directory exists.
- false if the file or directory does NOT exists.
Example Code
/*
* Created by ArduinoGetStarted.com
*
* This example code is in the public domain
*
* Tutorial page: https://arduinogetstarted.com/reference/library/arduino-sd.exists
*/
#include <SD.h>
#define PIN_SPI_CS 4
void setup() {
Serial.begin(9600);
if (!SD.begin(PIN_SPI_CS)) {
Serial.println("SD CARD FAILED, OR NOT PRESENT!");
while (1); // don't do anything more:
}
if (!SD.exists("arduino.txt"))
Serial.println("arduino.txt doesn't exist on SD Card");
else
Serial.println("arduino.txt exists on SD Card");
}
void loop() {
}
Tutorials
See Also
※ ARDUINO BUY RECOMMENDATION
| Arduino UNO R3 | |
| Arduino Starter Kit |
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