readSpiffs.cpp

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#include <Arduino.h>
#include <SPIFFS.h>
 
#define MAX_DEBUG    
#define DELETE_FILES 
void setup()
{
  // Initialize Serial for debugging
  Serial.begin(115200);
  while (!Serial) {
    ; // Wait until Serial is ready
  }
 
  // Initialize SPIFFS
  if (!SPIFFS.begin(true)) {
    Serial.println("Error mounting SPIFFS");
    return;
  }
 
  // List files in SPIFFS
  Serial.println("Files in SPIFFS:");
  File root = SPIFFS.open("/");
  File file = root.openNextFile();
  while (file) {
    log_v("Name: %s", file.name());
// Read and display the entire content of the file
#ifdef MAX_DEBUG
    Serial.print("Content: ");
    while (file.available()) {
      char buffer[101];                                // Buffer to store the read characters
      int  bytesRead    = file.readBytes(buffer, 100); // Read up to 100 characters
      buffer[bytesRead] = '\0';                        // Ensure the buffer is null-terminated
      Serial.print(buffer);
    }
    Serial.println(); // New line after displaying the file content
#endif
    file = root.openNextFile();
  }
 
  // Delete all files in SPIFFS
#ifdef DELETE_FILES
  root = SPIFFS.open("/");
  file = root.openNextFile();
  while (file) {
    const char* fileName = file.name();
    if (fileName && strlen(fileName) > 0) {
      log_w("Deleting file: %s", fileName);
      if (SPIFFS.remove(fileName)) {
        log_i("File deleted successfully");
      }
      else {
        log_e("Error deleting file");
      }
    }
    else {
      log_w("Invalid file name");
    }
    file = root.openNextFile();
  }
 
  // List files in SPIFFS after deletion
  Serial.println("Files in SPIFFS after deletion:");
  root = SPIFFS.open("/");
  file = root.openNextFile();
  while (file) {
    Serial.print("Name: ");
    Serial.println(file.name());
    file = root.openNextFile();
  }
#endif
}
 
void loop()
{
  // No code needed in the loop for this operation
}