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Explore various non-volatile memory options for the ESP32 microcontroller in this comprehensive 40-minute tutorial. Learn how to implement data persistence across power cycles using multiple storage technologies including built-in Flash memory with NVS (Non-Volatile Storage), traditional EEPROM, external SPI Flash chips, and high-performance FRAM (Ferroelectric RAM). Master essential techniques for logging sensor data, saving user preferences, storing configuration settings, and managing large files for web interfaces. Discover the advantages and implementation methods for each storage type, from the ESP32's internal Flash memory capabilities to adding external memory solutions that can retain data for years without power. Gain practical programming skills for data retention, file management, and machine state preservation that are crucial for robust embedded applications.
