Mesh node on off state save using FDS

RE: Mesh node on off state save using FDS

Hung Bui — Wed, 23 Jun 2021 07:22:50 GMT

Hi Erdi,
This is a 2 years old case. Please create a new case for your problem.

Please have a look at my quotation from the documentation in earlier reply. Note that defragmentation will be executed automatically so you don't need to do anything.

RE: Mesh node on off state save using FDS

erdidedemli — Tue, 22 Jun 2021 15:10:28 GMT

I'm having the same problem right now. How did you overcome this problem ?

RE: Mesh node on off state save using FDS

Prasad — Wed, 29 May 2019 08:39:48 GMT

I have tested with flash manager library. It seem work fine

We assume maximum number of color change per day as 5. So is this method efficient.

RE: Mesh node on off state save using FDS

Hung Bui — Thu, 23 May 2019 15:12:54 GMT

We do have wear leveling protection with the flash manager library. You can find this in the documentation of flash manager:

Defragmentation

Due to limitations in the flash hardware, replacing handles in the flash manager means writing a completely new entry at the end of the existing entries and then invalidating the old entry. This will eventually cause the flash area to fill up with invalid entries, which prevents adding or replacing more entries. When this happens, the invalid entries must be removed and the page rebuilt with only the valid entries that are present. This process is called defragmentation.

How often do you have the light changing ?

RE: Mesh node on off state save using FDS

Prasad — Thu, 23 May 2019 14:19:17 GMT

Hi,

We need to store color every time it changed from app. Otherwise in case of power failure we're not able to recover it.

And there are limited number of writing cycles in flash memory. So simply it can exceed.

That is the reason we choose FDS, because it has wear leveling feature.

So can we use Flash manager library to do the same thing ?

And is there any example on how to use flash manager library ?

RE: Mesh node on off state save using FDS

Hung Bui — Wed, 22 May 2019 11:22:39 GMT

What exactly the problem you have with FDS ? As long as you configure the FDS (and fstorage) with different space to the Mesh's flash library you should be fine.

Any particular reason you want to use fds instead of the flash library ?