HOW TO CHECK OR READ THE LIST OF BONDED DEVICE FROM NRF52832

Question

Hi, 
 
 Our project is 2D-3D mouse. we are using nordic "ble_hid_mouse" application with some required changes for our application. 
 SDK we are using is 15.3 
 
 ISSUES 
 The problem we are facing .If we connected our mouse(peripheral) and with a pc (central) you known that bonding information of mouse will store on pc and vise versa . 
 Suppose if we remove the our device (mouse) from the pc device list .Bonding information from pc(central side) will delete. So if we try to connect the our device( peripheral ) again to the same pc driver error will shown and the connection will not establish .These is because our device contains the bonding information of pc but pc has not. If we delete the bond information from our device too then there is no issue. 
 In the nordic nrf-Mouse there method for deleting the bond information from nrf52832 side is by pressing a button manually . But in our case its not applicable .We need to delete the bond information from nrf52832 side automatically if the central delete the bond . 
 So we find-out a solution for these by referring https://devzone.nordicsemi.com/f/nordic-q-a/9506/bond-deletion-notification this nordic ticket. Please look the marked portion of screen shot 
 we are following the first scenario. 
 
 So based on these ticket .After the central(pc) and peripheral( our mouse) connected and also if the central sends pairing request and the peripheral application receive the BLE_GAP_EVT_SEC_PARAMS_REQUEST event we deleting the bonding information from nrf52832.Look the screen shot below. 
 
 It is an effective way but it showing some issue if we connected on multiple pc without removing it. 
 
 WE NEED 
 In the above code(screen shot) before deleting the bond information we need to check list of bonded device in peripheral(nrf52832) and if the central address is already present in bonded device list then only we need to delete the specific bond from nrf52832 . 
 Is there any way for thsese. 
 Which function is used to the list of the read address bonded device from nrf52832. 
 which are the function to get the address of the central device. 
 
 Please reply as soon as possible.

Einar Thorsrud · Accepted Answer

Hi Nandhu, 
 Please disregard the information you have been looking at before, as that is both outdated and irrelevant for what you want to achieve. The Peer manager library, which is responsible for handling bonding information in SDK 15.3, has support for the functionality you want. You can allow the nRF to bond again with a peer that has deleted the bonding information by adding the following case to the handling of peer manager events in your application (typically in a function called pm_evt_handler() in SDK examples). 
 case PM_EVT_CONN_SEC_CONFIG_REQ:
 {
 // Allow pairing request from an already bonded peer.
 pm_conn_sec_config_t conn_sec_config = {.allow_repairing = true};
 pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
 } break; 
 This is all you need to change since everything is handled for you by the peer manager. 
 Br, 
 Einar

HOW TO CHECK OR READ THE LIST OF BONDED DEVICE FROM NRF52832

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