Comments on: ESP32 Flash Memory – Store Permanent Data (Write and Read)

By: Sara Santos

Sara Santos — Thu, 05 Oct 2023 14:06:31 +0000

In reply to Bunty.

Hi.
I think this will help: https://forum.arduino.cc/t/eeprom-storing-numbers-larger-then-256/317188
Regards,
Sara

By: Bunty

Bunty — Thu, 05 Oct 2023 12:07:26 +0000

i want store 1500 string in ESP32 EEPROM each String size is 12 byte its possible

By: Mehdi

Mehdi — Tue, 12 Sep 2023 07:22:58 +0000

Hi
Can use EEPROM and ESP32 like flash memory(micro sd card), and use for example this code:File MyFile = SD.open(dfName, “r”);
thanks

By: Sara Santos

Sara Santos — Mon, 14 Aug 2023 09:10:34 +0000

In reply to Talha Khan.

Hi.
Here’s your answer: https://playground.arduino.cc/Code/EEPROMWriteAnything/
Regards,
Sara

By: Talha Khan

Talha Khan — Fri, 11 Aug 2023 11:40:26 +0000

If I wanted to write a value of more than 255 in a register, what can I do? Is it even possible?

By: Hadrian

Hadrian — Mon, 31 Jul 2023 19:04:22 +0000

Hi Sara, I’ve been serching for tutorials on how to use external SPI flash memory chips, but have only found some about EEPROM. I would like, if it is possible, to use a flash memory chip as if it was an SD card to write and read strings. I really don’t know if there are any libraries that that allow to do this. I have previously used the internal memory on the ESP32 with the SPIFFS file system, but as far as I understand that it’s not the same as hooking up an external SPI flash memory module. My objective is to store G-code. Perhaps it could be more complicated than I think it is since there’s less information available about this topic.

By: Maxim Kachurovskiy

Maxim Kachurovskiy — Sun, 07 May 2023 12:04:00 +0000

Beware EEPROM.commit() – it takes 30ms and during that time interrupts aren’t handled. They get processed once commit is done.

All except the first interrupt that happen during those 30ms are ignored.

https://github.com/espressif/arduino-esp32/issues/8169

By: Fritz

Fritz — Wed, 19 Oct 2022 11:04:38 +0000

In reply to Imre.

I know there’s an Arduino library called EEPROMex.h which permits managing of floats in EEPROM.
I don’t know if this library Is compatibile in ESP32…

By: Sara Santos

Sara Santos — Sun, 31 Oct 2021 12:34:49 +0000

In reply to Tamarni Harris.

Hi.
It already does that automatically.
Regards,
Sara

By: Tamarni Harris

Tamarni Harris — Sat, 30 Oct 2021 13:51:19 +0000

Hi,
How do you only save to flash if the value changes?