How to Write and Read from the 24LC256 EEPROM with Arduino UNO | Step-by-Step Guide

In this tutorial, we will learn how to communicate with the 24LC256 external EEPROM using the Arduino UNO. We will cover how to read and write data to the EEPROM, providing a hands-on approach for integrating external memory into your projects. The 24LC256 is a 256kbit I2C-based EEPROM, and we'll demonstrate how to use the I2C protocol to send and retrieve data from this external memory.

What you'll learn:

How to connect the 24LC256 EEPROM to the Arduino UNO

Step-by-step process for writing data to the EEPROM

How to read and retrieve stored data from the EEPROM

Basic I2C communication concepts used with the Arduino

Troubleshooting tips and best practices

By the end of this tutorial, you’ll be able to use external EEPROMs like the 24LC256 to store data, expand memory, and improve your Arduino projects.

[Friendroid]

Thank you for taking the time to record this tutorial, it helped me get three radios from the 90s to work again.

[bertruiten]

Ali, clearly explained!
When I change frequencies to station names
how can i storing this in external eeprom.

[carstenfunk]

Great explanation! Thanks a lot!

What has been wrong about the initialization? I did not get this point why the reading has been "0" first for all 10 memory cells?

[bertruiten]

Hi Ali, I only want to store station names in the eeprom and not the frequencies.