SPI Flash File System (SPIFFS) is a filesystem created for small embedded systems. SPIFFS has many advantages since it allows you to create files and simulate directories.
The following are the features of SPIFFS:
- Designed for low RAM use on microcontrollers
- Uses statically sized RAM buffers
- Posix-like api: open, close, read, write, seek, stat, and so on
- It can run on any NOR flash, not only the SPI flash. Multiple SPIFFS configurations can run on the same target - and even on the same SPI flash device
- Implements static wear levelling
- Built-in filesystem consistency checks
- Highly configurable and can be adapted for a variety of flash types
I highly encourage you to use SPIFFS in your designs to store data in NOR flash since it is very easy to read and write data, is like a *nix filesystem.
Filesystem size depends on the flash chip size. Depending on the board that is selected in the IDE, you can select different sizes for SPIFFS. For example, in case if you have selected the NodeMcu v1.0 as...