1.目的
防止别的设备连上自己的蓝牙设备,可以使用配对
2.分析
在实际应用中,经常用到配对,使指定设备连接
3.平台:
协议栈版本:SDK10.0.0
编译软件:keil 5.12
硬件平台:nrf51822最小系统
例子:E:\SDK10.0\examples\ble_peripheral\ble_app_hrs\pca10028\s110\arm4 //心率
4.步骤
int main(void) { uint32_t err_code; bool erase_bonds; // Initialize. app_trace_init(); timers_init(); buttons_leds_init(&erase_bonds); ble_stack_init(); device_manager_init(erase_bonds); gap_params_init(); advertising_init(); services_init(); sensor_simulator_init(); conn_params_init(); //下面是添加设置配对密码 uint8_t *passcode="123456"; ble_opt_t static_option; static_option.gap_opt.passkey.p_passkey = passcode; err_code = sd_ble_opt_set(BLE_GAP_OPT_PASSKEY, &static_option); APP_ERROR_CHECK(err_code); // Start execution. application_timers_start(); err_code = ble_advertising_start(BLE_ADV_MODE_FAST); APP_ERROR_CHECK(err_code); // Enter main loop. for (;;) { power_manage(); } }
配对设置
#define SEC_PARAM_BOND 1 /**< Perform bonding. */ #define SEC_PARAM_MITM 1 /**< Man In The Middle protection not required. */ #define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_DISPLAY_ONLY /**< No I/O capabilities. */ #define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */ #define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size. */ #define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size. */
<pre name="code" class="cpp">static void device_manager_init(bool erase_bonds) { uint32_t err_code; dm_init_param_t init_param = {.clear_persistent_data = erase_bonds}; dm_application_param_t register_param; // Initialize persistent storage module. err_code = pstorage_init(); APP_ERROR_CHECK(err_code); err_code = dm_init(&init_param); APP_ERROR_CHECK(err_code); memset(®ister_param.sec_param, 0, sizeof(ble_gap_sec_params_t)); register_param.sec_param.bond = SEC_PARAM_BOND; register_param.sec_param.mitm = SEC_PARAM_MITM; register_param.sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES; register_param.sec_param.oob = SEC_PARAM_OOB; register_param.sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE; register_param.sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE; register_param.evt_handler = device_manager_evt_handler; register_param.service_type = DM_PROTOCOL_CNTXT_GATT_SRVR_ID; err_code = dm_register(&m_app_handle, ®ister_param); APP_ERROR_CHECK(err_code); }
定义了一个配对请求事件。
static dm_handle_t m_peer_handle; /**< Identifes the peer that is currently connected. */ APP_TIMER_DEF(m_sec_req_timer_id); #define SECURITY_REQUEST_DELAY APP_TIMER_TICKS(100, APP_TIMER_PRESCALER) /**< Delay after connection until Security Request is sent, if necessary (ticks). */
static void timers_init(void) { uint32_t err_code; // Initialize timer module. APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false); // Create timers. err_code = app_timer_create(&m_battery_timer_id, APP_TIMER_MODE_REPEATED, battery_level_meas_timeout_handler); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_heart_rate_timer_id, APP_TIMER_MODE_REPEATED, heart_rate_meas_timeout_handler); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_rr_interval_timer_id, APP_TIMER_MODE_REPEATED, rr_interval_timeout_handler); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_sensor_contact_timer_id, APP_TIMER_MODE_REPEATED, sensor_contact_detected_timeout_handler); APP_ERROR_CHECK(err_code); //建立配对事件 err_code = app_timer_create(&m_sec_req_timer_id, APP_TIMER_MODE_SINGLE_SHOT, sec_req_timeout_handler); }
#define APP_TIMER_OP_QUEUE_SIZE 5 /**< Size of timer operation queues. */
下面是配对事件回调函数
蓝牙连上设备产生DM_EVT_CONNECTION事件,然后启动配对事件app_timer_start(m_sec_req_timer_id, SECURITY_REQUEST_DELAY, NULL);
跳出输入密码对话框产生DM_EVT_SECURITY_SETUP事件,输入密码完然后按确定产生DM_EVT_SECURITY_SETUP_COMPLETE事件,如果密码正确产生DM_EVT_LINK_SECURED事件,密码错误产生DM_EVT_DEVICE_CONTEXT_DELETED事件,同时也会产生BLE_GAP_EVT_AUTH_STATUS里面状态会显示不成功,这个时候要看是否在连接着,如果连接着 并且密码错误,则断开。。
static uint32_t device_manager_evt_handler(dm_handle_t const * p_handle, dm_event_t const * p_event, ret_code_t event_result) { APP_ERROR_CHECK(event_result); switch(p_event->event_id) { case DM_EVT_CONNECTION: m_peer_handle = (*p_handle); app_timer_start(m_sec_req_timer_id, SECURITY_REQUEST_DELAY, NULL); break; case DM_EVT_DISCONNECTION: // dm_device_delete_all(&m_peer_handle); break; case DM_EVT_SECURITY_SETUP : break; case DM_EVT_SECURITY_SETUP_COMPLETE : break; case DM_EVT_DEVICE_CONTEXT_DELETED: // if (m_conn_handle != BLE_CONN_HANDLE_INVALID) // { // sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); // } break; case DM_EVT_LINK_SECURED: break; default : break; } #ifdef BLE_DFU_APP_SUPPORT if (p_event->event_id == DM_EVT_LINK_SECURED) { app_context_load(p_handle); } #endif // BLE_DFU_APP_SUPPORT return NRF_SUCCESS; }
static void on_ble_evt(ble_evt_t * p_ble_evt) { uint32_t err_code; switch (p_ble_evt->header.evt_id) { case BLE_GAP_EVT_CONNECTED: err_code = bsp_indication_set(BSP_INDICATE_CONNECTED); APP_ERROR_CHECK(err_code); m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle; break; case BLE_GAP_EVT_DISCONNECTED: m_conn_handle = BLE_CONN_HANDLE_INVALID; //新添加代码 dm_device_delete_all(&m_app_handle); break; case BLE_GAP_EVT_AUTH_STATUS: //如下是添加代码 配对密码是否匹配
<span style="white-space:pre"> </span> if(p_ble_evt->evt.gap_evt.params.auth_status.auth_status != BLE_GAP_SEC_STATUS_SUCCESS) sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);<span style="white-space:pre"> </span> break; default: // No implementation needed. break; } }
是不是 密码配对框出来了。。。。。接下来输入密码正确可以正常连上 ,错误连接不上。。并且每次连上都素要密码。