I want store sensors data if connection lost

[Mannu]

Hello Support,

I have developed one device based on NRF52,it has interfaced 4 sensors.It's working fine.

Now i want add one feature is that if sometime connection lost between apk and device then data should be stored in nrf52 upto some extend

so ,is there any SDK support for same, like any API to save and read

or any other method for same

Please help me

Thanks.

[awneil]

How much data? For How long?

In RAM, or Flash?

For Flash, look at https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/lib_fds_functionality

See also

https://devzone.nordicsemi.com/f/nordic-q-a/35843/flash-data-storage-fds-what-is-the-point-of-files-and-records

https://devzone.nordicsemi.com/f/nordic-q-a/37743/problem-with-fds-flash-read-write-delete-calling-that-function-using-android-phone/145495#145495

https://devzone.nordicsemi.com/f/nordic-q-a/37743/problem-with-fds-flash-read-write-delete-calling-that-function-using-android-phone/154122#154122

[Mannu]

i don't know which is the best for storage( ram or rom) .i need to store data as long as possible . it should be like FIFO storage if storage become full then data will get start removing from first byte and append byte at last.so at all there will be latest data for given duration

[awneil]

Mannu said:

i don't know which is the best for storage( ram or rom)

So think about the pros & cons of the 2 types of storage...

(Note that it's Flash,  not ROM. ROM would be useless!)

What is "best" depends entirely on the specific requirements & constraints of your particular project - only you know what they are!

[Mannu]

Okay thanks awneilfor ur answer,let me review all links that you provided me and will give you update soon

[awneil]

The links are all about Flash storage.

If RAM works for you, then you could just use a simple Ring Buffer ...