# SPI Flash for Persistent Data Storage with NuttX RTOS

DevFeed: [SPI Flash for Persistent Data Storage with NuttX RTOS](<https://devfeed.tech/articles/spi-flash-for-persistent-data-storage-with-nuttx-rtos-13725.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2025/09/nuttx-storing-data-spi-flash/>)

Author: John Lee

Published: 2025-09-23T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [NuttX](<https://devfeed.tech/topics/nuttx.md>), [Embedded Systems](<https://devfeed.tech/topics/embedded-systems.md>), [Filesystems](<https://devfeed.tech/topics/filesystems.md>), [data-processing](<https://devfeed.tech/topics/data-processing.md>), [Logging](<https://devfeed.tech/topics/logging.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>), [boot](<https://devfeed.tech/topics/boot.md>)

Tags: [apache](<https://devfeed.tech/tags/apache.md>), [applications](<https://devfeed.tech/tags/applications.md>), [blog](<https://devfeed.tech/tags/blog.md>), [boot](<https://devfeed.tech/tags/boot.md>), [code](<https://devfeed.tech/tags/code.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [data](<https://devfeed.tech/tags/data.md>), [developers](<https://devfeed.tech/tags/developers.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [examples](<https://devfeed.tech/tags/examples.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [flash](<https://devfeed.tech/tags/flash.md>), [guide](<https://devfeed.tech/tags/guide.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [logging](<https://devfeed.tech/tags/logging.md>), [memory](<https://devfeed.tech/tags/memory.md>), [ntp](<https://devfeed.tech/tags/ntp.md>), [nuttx](<https://devfeed.tech/tags/nuttx.md>), [spi](<https://devfeed.tech/tags/spi.md>), [spiffs](<https://devfeed.tech/tags/spiffs.md>), [storage](<https://devfeed.tech/tags/storage.md>), [systems](<https://devfeed.tech/tags/systems.md>)

## AI overview

This guide explains how to use Espressif device flash memory for persistent data storage with NuttX. It covers SPI Flash NOR fundamentals, compares file systems including SmartFS, SPIFFS, and LittleFS, and demonstrates a Wi-Fi application that synchronizes the system clock and logs the current time to a flash-resident file.

## Source excerpt

This guide explores how to utilize flash memory for persistent data storage in NuttX-based embedded systems, covering SPI Flash fundamentals, file system options (SmartFS, SPIFFS, LittleFS), and practical implementation of a boot time logging application with Wi-Fi and NTP synchronization.