The usability of flash in the mesh network.

[lgs]

Now I want to construct a mesh network in an intermittent environment. You know the device will power off and power on frequently, I need to store the communication statin in the memory frequently. The SDK document says "The flash hardware can withstand a limited number of write and erase cycles. As the Bluetooth mesh stack uses the flash to store state across power failures, the device flash will eventually start failing, resulting in unexpected behaviour in the Bluetooth mesh stack." So, I am not sure whether I can deploy my programme on it or not. 

[Simonr]

Hi

The Flash memory endurance of the nRF52840 is specified to be able to handle 10 000 write/erase cycles. Are you worried that the device will burn through more writes/erases than this?

Best regards,

Simon

[lgs]

No, I mean it may be about the software problems. For example, it will appear some exceptions or errors when running after recover the states. The document said it will result in unexpected behaviour in the Bluetooth mesh stack. 

[Simonr]

Hi

I'm not sure I understand what you mean, but the Flash should be safe to use for as long as the Flash memory can last, as it won't start with unexpected behavior until the flash hardware has exerted the HW limit. The Calculating flash lifetime section should give you an indication of how long stored data in the flash can be expected to last.

Best regards,

Simon