I am using SDK nRF5_SDK_14.0.0_3bcc1f7 in my project. All the features was working but i need to add the security mode 1 level 4 security in our BLE device with LESC. I have added security in buttonless DFU code taking reference from ble_app_multirole_lesc example code. I am using a button for MITM.
#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */
#define LESC_MITM_NC 1 /**< Use MITM (Numeric Comparison). */
#define SEC_PARAMS_BOND 1 /**< Perform bonding. */
#if LESC_MITM_NC
#define SEC_PARAMS_MITM 1 /**< Man In The Middle protection required. */
#define SEC_PARAMS_IO_CAPABILITIES BLE_GAP_IO_CAPS_DISPLAY_YESNO /**< Display Yes/No to force Numeric Comparison. */
#else
#define SEC_PARAMS_MITM 0 /**< Man In The Middle protection required. */
#define SEC_PARAMS_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O caps. */
#endif
#define SEC_PARAMS_LESC 1 /**< LE Secure Connections pairing required. */
#define SEC_PARAMS_KEYPRESS 0 /**< Keypress notifications not required. */
#define SEC_PARAMS_OOB 0 /**< Out Of Band data not available. */
#define SEC_PARAMS_MIN_KEY_SIZE 7 /**< Minimum encryption key size in octets. */
#define SEC_PARAMS_MAX_KEY_SIZE 16 /**< Maximum encryption key size in octets. */
#define BLE_GAP_LESC_P256_SK_LEN 32
Pairing and Bonding is working as expected, but sometimes I observed during pairing process if I press the device button, device go in hang state and sometimes cause HardFault Error. I check with debug mode, but nothing found the cause for that. How can i check what is causing the HardFault Error? And is there any known issue with this SDK for LESC connection that can cause this HardFault Error?
