How safe is it to use fds long term on nrf9160?

[rkguy]

It looks like that 1Mb flash is useful for people like me who don't want to worry about external flash. The question I have is how aggressively I can use the storage? It only has so many writes, just like anything. Is it safer than rewriting to eeprom? I assume so. Can you confirm?

I plan to setup a ring memory. The idea is simple, store the latest reading and the most recent readingsn as well. This is useful if there is a communication failure or any other reason that the device could need to store locally for a long period of time. 

Any suggestions?

[Simon]

The flash memory in the nRF9160 can tolerate 10000 write/erase cycles (take a look at nRF9160 - Absolute maximum ratings), if you perform 3 write/erase cycles of the whole flash every day, it will last around 9-10 years. 

Take a look at this library, which will help you with storing data in flash in a FIFO-managed circular buffer.

Best regards,

Simon

[rkguy]

Great thank you. Is there an example or reference for using this with a 9160?

[Simon]

There is an example using NVS located here: ncs\zephyr\samples\subsys\nvs.

Best regards,

Simon