How to save data permanently ?

[cylex]

In order to have access to certain values even after my LoPy crashes, I want to save them permanently... What is the way you guys prefer for saving data in the persistent storage?

[danielm]

@livius
FW of the SD card should prevent corruption of file system of the card if power fail happens during writing. How this is achieved I don't know.

[livius]

@danielm said in How to save data permanently ?:

Company called Swissbit offers SD cards with power fail protection. Unfortunately I do not have any experience with them yet.

I cannot even imgine what it prevent in power fail?

[danielm]

I suggest NOT to use internal file-system because in my opinion it could get corrupted if power outage would happen during execution of write command. I experienced this behavior on MicroPython for TI CC3200.
Company called Swissbit offers SD cards with power fail protection. Unfortunately I do not have any experience with them yet.
https://www.swissbit.com/products/nand-flash-products/cards/micro-sd-memory-cards/

[TravisT]

I woud say file is simple and easy, or adding FRAM or Flash.

[RobTuDelft]

You can save any data to a file on the Lopy. There is also a SD class for interfacing with SD cards. As for as I know there is no way to store anything in the EEPROM I believe.