Switch over to LittleFS

[cgreening]

SPIFFS seems to be a bit broken (doesn't always seem to be able to save data).

Let's try switching to LittleFS: https://github.com/joltwallet/esp_littlefs

[cgreening]

This seems to be a lot more complicated than I initially thought. There isn't official support for LittleFS in the ESP32 and platformio doesn't have out of the box support for building LittleFS filesystems when using the ESP32.

[Pablo2048]

Hi Chris. There is official support for LittleFS, unfortunately in Core 2.0.0 which is not availble right now directly in pio. You can do some workarounds. For example:

• You can use Lorol's LITTLEFS library (Library name has changed in the Core for ESP8266 compatibility)
• You can use small patch to filesystem build tools. The patch consists of two steps: one is simple python script:

Import("env")
env.Replace( MKSPIFFSTOOL=env.get("PROJECT_DIR") + '/tools/mklittlefs/mklittlefs' )

the script is named littlefsbuilder.py, and I'm using it like this (in the platformio.ini):

extra_scripts =
  ./tools/littlefsbuilder/littlefsbuilder.py

You have to install mklittlefs tool into tools/mklittlefs/ subdirectory.

You can give it a try.

[cgreening]

Tempted to wait on this one until platformio has official support - I'm a bit worried about how to make it work cross platform.