LittleFS with ESP8266 to Read, Write and Delete Data on Flash Memory of NodeMCU

This project integrates the ESP8266 NodeMCU's onboard flash memory with an I2C 16x2 LCD display to perform file-based data operations using the LittleFS file system. The ESP8266 features a robust microcontroller with integrated Wi-Fi and a large portion of its flash memory dedicated to user files. By utilizing the LittleFS library, the microcontroller can mount this flash memory to create, read, write, and delete files directly on the hardware without needing an external SD card. The I2C module (using the PC8574T chip) simplifies the wiring between the NodeMCU and the 16x2 LCD display by converting the serial I2C protocol—requiring only two data lines (SDA and SCL) plus power—into the parallel signals needed by the screen. When the system boots up, the NodeMCU mounts the LittleFS partition, executes file writing or reading routines, and updates the state on the connected display. Power is distributed across a standard breadboard using jumper wires, connecting the NodeMCU's 3.3V or 5V rails, ground, and I2C pins to the LCD display module. This architecture allows an undergraduate engineering system to manage persistent variables, configuration parameters, or logged sensor states locally on the flash memory, displaying operational statuses in real time on the LCD screen.