LITTLEFS

LITTLEFS

LittleFS library for arduino-esp32

• A LittleFS wrapper for Arduino ESP32 of Mbed LittleFS
• Based on ESP-IDF port of joltwallet/esp_littlefs , thank you Brian!
• Functionality is similar to SPIFFS
• Either LITTLEFS or SPIFFS but not both simultaneously can be used in same Arduino project
• Related PR in esp32 core development

Warning: Depends on ESP-IDF, esp32 core and esp_littlefs versions

• Tested on master esp32-core #git b92c58d and on core release 1.0.4

• For esp32-core, newer than release 1.0.4 (IDF v3.3 or later) you can comment this line of esp_littlefs.c to use the vfs_littlefs_utime feature:

  #define CONFIG_LITTLEFS_FOR_IDF_3_2 
  

Installation

• Copy LITTLEFS to Arduino IDE libraries
(see File > Preferences > Sketchbook location).

Usage

• In your existing code, replace SPIFFS like this

  #define USE_LittleFS
  
  #include <FS.h>
  #ifdef USE_LittleFS
  #define SPIFFS LITTLEFS
  #include <LITTLEFS.h> 
  #else
  #include <SPIFFS.h>
  #endif 
  

Differences with SPIFFS (and in this implementation)

• LittleFS has folders, you my need to tweak your code to iterate files in folders
• Root: /someting = something, so attention to /
• Lower level littlefs library cannot mount on NULL as partition_label name, while SPIFFS can
• Lower level littlefs library does not need maxOpenFiles parameter
• Speed (LITTLEFS_Test.ino) 1048576 bytes written in 16238 ms / 1048576 bytes read in 918 ms
• Speed (SPIFFS_Test.ino) 1048576 bytes written in 65971 ms / 1048576 bytes read in 680 ms

Arduino ESP32 LittleFS filesystem upload tool

• Download the tool jar from here
• In your Arduino sketchbook directory, create tools directory if it doesn't exist yet.
• Copy the tool into tools directory (the path should be <home_dir>/Arduino/tools/ESP32LittleFS/tool/esp32littlefs.jar).
• You need the mklittlefs tool Download the release and copy it to packages\esp32\tools\mkspiffs<mklittlefs rev. x.x.x>\ or on checkout (dev) environment to: packages\esp32\hardware\esp32<release>\tools\mklittlefs\
• Restart Arduino IDE.

Credits and license

• This work is based on Mbed LittleFS , ESP-IDF port of joltwallet/esp_littlefs , Espressif Arduino core for the ESP32, the ESP-IDF - SPIFFS Library
• Licensed under GPL v2 (text)

To Do

• Supporting smarter different IDF versions