If my device only acts as a peripheral, does it need to respond to BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST events? In other words, is BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST a central-only event?
In addition, just to confirm, BLE_GAP_EVT_PHY_UPDATE_REQUEST and BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST can occur on either a central or a peripheral device right?