NCS 2.8.0
Ble device acting as both central and peripheral.
CONFIG_BT=y
CONFIG_BT_LL_SOFTDEVICE=y
CONFIG_BT_DEVICE_NAME_DYNAMIC=y
#for cenral devices these are set..
#CONFIG_BT_CENTRAL=y
#CONFIG_BT_MAX_CONN=8
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_BROADCASTER=y
CONFIG_BT_PERIPHERAL_PREF_MIN_INT=12
CONFIG_BT_PERIPHERAL_PREF_MAX_INT=12
CONFIG_BT_PERIPHERAL_PREF_LATENCY=0
CONFIG_BT_PERIPHERAL_PREF_TIMEOUT=500
CONFIG_BT_CONN_PARAM_UPDATE_TIMEOUT=500
CONFIG_BT_CONN_PARAM_RETRY_TIMEOUT=1000
CONFIG_BT_DATA_LEN_UPDATE=y
CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_USER_PHY_UPDATE=y
CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_ATT_TX_COUNT=10
CONFIG_BT_BUF_ACL_TX_SIZE=257
CONFIG_BT_CTLR=y
CONFIG_BT_HCI=y
CONFIG_BT_HCI_VS_EVT_USER=y
CONFIG_BT_SMP=y
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
CONFIG_BT_CTLR_PHY_2M=y
CONFIG_BT_CTLR_PHY_CODED=y
CONFIG_BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT=4000000
CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=1
CONFIG_BT_CTLR_SDC_CONN_ANCHOR_POINT_REPORT=y
I'm working on a special use case where nrf52840 central will connect with multiple nrf52840 peripheral devices.
During my testing I'm encountering a situation with the peripheral device where the central is able connect successfully once but then on subsequent connections immediately fails.
The failure is cleared if I reset the device.
I trapped the call to bt_conn_set_state that is setting DISCONNECTED state and looking up the stack shows the error is coming from hci_hardware_error
