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@@ -1,2 +1,55 @@
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# LITTLEFS
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-LittleFS library for arduino-esp32
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+## LittleFS library for arduino-esp32
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+
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+- A LittleFS wrapper for Arduino ESP32 of [Mbed LittleFS](https://github.com/ARMmbed/littlefs)
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+- Based on [ESP-IDF port of joltwallet/esp_littlefs](https://github.com/joltwallet/esp_littlefs) , thank you Brian!
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+- Independent library, no need ESP-IDF SDK and arduino + littlefs component recompiling / re-integration, but it could be implemented this way, too.
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+- Functionality is the same and SPIFFS partition scheme and data folder meaning are kept
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+- You can use either LITTLEFS or SPIFFS but not both simultaneously on given Arduino project
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+
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+### Installation
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+
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+- Make sure you use one of the supported versions of Arduino IDE and have ESP32 core installed. (tested on 1.0.4)
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+- Copy <b>LITTLEFS</b> folder to Arduino IDE embedded libraries place
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+- For Win, the default place of arduino-esp32 core libraries is somewhere like:
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+```C:\Users\<username>\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries ```
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+- Alternatively, you can put it to your usual libraries place
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+
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+### Usage
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+
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+- In your existing code, replace SPIFFS like this
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+```
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+#define USE_LittleFS
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+
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+#include <FS.h>
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+#ifdef USE_LittleFS
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+ #define SPIFFS LITTLEFS
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+ #include <LITTLEFS.h>
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+#else
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+ #include <SPIFFS.h>
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+#endif
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+ ```
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+### Differences with SPIFFS (and in this implementation)
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+
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+- LittleFS has folders, you my need to tweak your code to iterate files in folders
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+- Root: /someting = something, so attention to /
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+- Lower level littlefs library cannot mount on NULL as partition_label name, while SPIFFS can
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+- Lower level littlefs library does not need maxOpenFiles parameter
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+- Speed (LITTLEFS_Test.ino) 1048576 bytes written in 16238 ms / 1048576 bytes read in 918 ms
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+- Speed (SPIFFS_Test.ino) 1048576 bytes written in 65971 ms / 1048576 bytes read in 680 ms
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+
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+
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+### Arduino ESP32 LittleFS filesystem upload tool
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+
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+- Download the tool archive from [here](https://github.com/lorol/arduino-esp32littlefs-plugin/raw/master/src/bin/esp32littlefs.jar)
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+- In your Arduino sketchbook directory, create tools directory if it doesn't exist yet.
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+- Unpack the tool into tools directory (the path will look like ```<home_dir>/Arduino/tools/ESP32LittleFS/tool/esp32littlefs.jar```).
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+- You need the [mklittlefs tool](https://github.com/earlephilhower/mklittlefs) Download the [release](https://github.com/earlephilhower/mklittlefs/releases) and copy it to
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+packages\esp32\tools\mkspiffs\<mklittlefs rev. x.x.x>\ or on checkout (dev) environment to: packages\esp32\hardware\esp32\<release>\tools\mklittlefs\
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+- Restart Arduino IDE.
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+
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+## Credits and license
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+
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+- This work is based on
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+- Licensed under GPL v2 ([text](LICENSE))
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+
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