//HID设备示例中需要多修改两处
//examples\bluetooth\bluedroid\ble\ble_hid_device_demo

//app_main中
esp_ble_auth_req_t auth_req = ESP_LE_AUTH_BOND;     //bonding with peer device after authentication
esp_ble_io_cap_t iocap = ESP_IO_CAP_OUT;           //set the IO capability to No output No input
uint8_t key_size = 16;      //the key size should be 7~16 bytes
uint8_t init_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
uint8_t rsp_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
//set static passkey
uint32_t passkey = 123456;
uint8_t auth_option = ESP_BLE_ONLY_ACCEPT_SPECIFIED_AUTH_DISABLE;
uint8_t oob_support = ESP_BLE_OOB_DISABLE;
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_STATIC_PASSKEY, &passkey, sizeof(uint32_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_AUTHEN_REQ_MODE, &auth_req, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_IOCAP_MODE, &iocap, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_MAX_KEY_SIZE, &key_size, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_ONLY_ACCEPT_SPECIFIED_SEC_AUTH, &auth_option, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_OOB_SUPPORT, &oob_support, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_INIT_KEY, &init_key, sizeof(uint8_t));
esp_ble_gap_set_security_param(ESP_BLE_SM_SET_RSP_KEY, &rsp_key, sizeof(uint8_t));
    
    
//另外需要将一处的参数ESP_BLE_SEC_ENCRYPT_NO_MITM修改为ESP_BLE_SEC_ENCRYPT_MITM
//esp_ble_set_encryption(param->connect.remote_bda, ESP_BLE_SEC_ENCRYPT_NO_MITM);
esp_ble_set_encryption(param->connect.remote_bda, ESP_BLE_SEC_ENCRYPT_MITM);