nRF51 peripheral max bond size

[johnny]

hi ~ 

peripheral can bond how many smartphones ? 

and  What will happened if over bond?

i use sdk12.2 below 'is my setting 

#define SEC_PARAM_BOND 1
#define SEC_PARAM_MITM 0 
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE
#define SEC_PARAM_LESC 1 
#define SEC_PARAM_KEYPRESS 0
#define SEC_PARAM_OOB 0
#define SEC_PARAM_MIN_KEY_SIZE 7
#define SEC_PARAM_MAX_KEY_SIZE 16

thanks

[JONATHAN LL]

Hi,

A bond has a variable length (~100 bytes, with 1 CCCD it can be ~ 152 bytes) based on what type of connection, central settings, etc. So estimated max number of bonds: ((FDS_VIRTUAL_PAGES - 1) * FDS_VIRTUAL_PAGE_SIZE*4 ) / 152 bytes.


Regards,
Jonathan

[johnny]

thank Jonathan

 ((FDS_VIRTUAL_PAGES - 1) * FDS_VIRTUAL_PAGE_SIZE*4 ) / 152 

( ( 3 - 1 ) * 256 * 4) / 152  = 13.4 

I try to bond thirty-two mobile phones, but it still connects successfully with the first one. Additionally, I'd like to ask you some questions as followings.

What happens if the number of bindings exceeds the limit? Will it enter this event "PM_EVT_STORAGE_FULL"? Or what will it happen?

[Sigurd]

johnny said:

What happens if the number of bindings exceeds the limit? Will it enter this event "PM_EVT_STORAGE_FULL"? Or what will it happen?

The peer manger PM_EVT_STORAGE_FULL will trigger deletion of the oldest peer