NanoBLEFlashPrefs: Library for missing EEPROM functionality on Nano 33 BLE

[DirkF]

There are some threads here looking for advice on how to substitute the missing EEPROM on the Arduino 33 BLE and BLE Sense. I think I came up with a nice solution, but the threads are all closed so I post this in a new thread.

I wrote a library called NanoBLEFlashPrefs. It allows to store parameters and preferences persistently between program restarts and even reprogramming.

The Arduino boards mentioned above use a nRF52840 microcontroller from Nordic Semiconductor. This chip features a very simple file system for flash storage. This is used in the library to store and retrieve an arbitrary struct of preferences of your program.

Please take a look at the GitHub repository of NanoBLEFlashPrefs. Comments welcome!

[Juraj]

for Arduino SAMD boards, for nRF51 and older nRF52 and for ESP8266 and ESP32 Arduino EEPROM library API is used to store values in flash. GitHub - d00616/arduino-NVM: Direct flash memory access, round robin virtual pages and EEPROM like memory.

[DirkF]

Thanks for pointing me to that library. It has a different, more low-level approach than NanoBLEFlashPrefs, right?

With NanoBLEFlashPrefs the stored values survive reflashing your sketch. And it uses a SoftDevice so you do not need to worry about radio notification or timing issues.