Saving data to memory

[JerryZW]

Hi, I am building a system using Nordic NRF52832 as a node. I would like to save some data (such as node ID) to board's memory so that the application can read these data even after power-off and power-on. Besides, I hope the data saved in the memory can by dynamically updated, since we hope the application can update the node ID based on the message sent by Phone. Could you please tell us where to start ? Thanks. 

I thought about saving node Id in UICR customer register, but I found out we can not erase these registers without erasing the whole chip, therefore seems like it does not support dynamic update while application is running. 

Thanks a lot for your assistance. 

[Einar Thorsrud]

Hi,

The Flash Data Storage (FDS) in the SDK is a simple flash file system that is intended for such use cases. You can refer to the Flash Data Storage Example to see how it is used. FDS is also used implicitly by most BLE examples, as the Peer manager use it to store bonding information.