USER_ADVERTISE_DATA

Hi Ruchi Patel

请查看SDK的ble\u app\u barebone示例，它演示了用户广告数据的动态变化。是的，您可以用不同的有效负载发送1个以上的广告包。ble\u app\u barebone示例也演示了该功能。广告字符串应该有一个特定的格式，如。您发布的代码块具有这种格式，因此可以这样做。广告包传输速率可以在的用户无向广告配置结构中定制
用户配置.h文件。广告分组在特定的广告间隔中传输，该广告间隔可以在该结构中改变

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你好，鲁奇·帕特尔，

您可以通过更改user\u adv\u conf结构（在user\u config.h中定义）的.intv\u min或.intv\u max菜单来配置播发数据包传输速率。这样，您就可以定义广告的最小和最大间隔。关于广告数据，您不仅可以修改生产广告数据。您还可以修改超过1字节的广告数据。SDK的ble\u app\u barebone示例动态更改广告字符串的适当性数据。在特定示例中，property数据的长度为2字节，但其长度可以更改。在广告字符串中，您可以附加特定的数据并从应用程序中更新它们。广告消息在app\u easy\u gap\u undirected\u advertise\u start\u create\u msg（）函数中创建，然后在调用app\u easy\u gap\u undirected\u advertise\u get\u active（）函数时保存在cmd结构中。cmd指针将有一个完整的消息，您可以将它发送到堆栈，其中包括一些默认的adv数据，这些数据来自用户advise数据，因此您可以在app easy\u gap\u undirected\u advised\u get\u active（）返回后执行，将包含广告数据的cmd指针中的数组作为目标（cmd->info.host.adv_data)并根据您的喜好进行更改—您的数据必须符合BLE规范。

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你好，鲁奇·帕特尔，

关于NMI_handler是独立于你dual-role application. The NMI_handler will be issued due to the WatchDog timer. Please check where the Watchdog hits into your application. Regarding the switching between broadcasting and observer mode, you shouldn’t do any additional changes. In the case of the broadcasting are you advertising as a non-connectable device? If not, you can use the app_easy_gap_non_connectable_advertise_start API to create the advertising message for non-connectable advertising. Also, I suggest you to use the .app_on_adv_nonconn_complete callback function when the advertising is done since this callback is triggered when advertising as a non-connectable device.

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嗨，鲁奇·帕特，

The #define “USER_ADVERTISE_DATA” is appended into the .NVDS_TAG_APP_BLE_ADV_DATA item of nvds_data_storage structure as you said in your post. You can define more than one USER_ADVERTISE_DATA, but only one of that can be appended in that structure due to the unique .NVDS_TAG_APP_BLE_ADV_DATA item. If you want to have more than one advertising data, you are able to do it but with a different way. I suggest you to define the USER_ADVERTISE_DATA as empty, and then append your different advertising data dynamically. When the device starts advertising, the user_app_adv_start() is executed and then the cmd is created by app_easy_gap_undirected_advertise_get_active(). The app_easy_gap_undirected_advertise_get_active() function returns the app_easy_gap_undirected_advertise_start_create_msg() function which creates the advertising message for a connectable undirected event. The advertising message includes the user advertising configurations, the advertising data and other data. The app_easy_gap_adv_read_from_NVDS() function reads USER_ADVERTISE_DATA from the nvds_data_storage structure, so if you have empty the USER_ADVERTISE_DATA define, your advertising data will be empty. By this way, you are able to append your different advertising data depending on your application dynamically by using app_add_ad_struct() in the user_app_adv_start() function.

Regarding the manufacturer data, when the device is in observer mode, the .app_on_adv_report_ind ind callback function (in user_callback_config.h file) will executed, so it shouldn’t be NULL and you should define a function to be triggered. When a GAPM_ADV_REPORT_IND is received, the gapm_adv_report_ind_handler() will executed which is executes the .app_on_adv_report_ind ind callback. This handler has input parameter the gapm_adv_report_ind structure, which includes the adv_report structure. The manufacturer data should be at the data[ADV_DATA_LEN] item of the adv_report scucture. So how do you actually check that the manufacturer data are not being received and all the other data received properly?

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你好，鲁奇·帕特尔，

Depending how you are using the SDK and which example you are using be aware that the SDK will append any extra data that don’t fit in the advertising string in the scan response data, so make sure that the data that you are interested in is in the advertising string and not the scan response data. In the first indication (advertising indication) the advertising data will populate the data member of the adv_report struct, and then in the second indication (scan response indication) the scan response data will populate the struct. In order to catch the scan response data, you should configure your device as GAPM_SCAN_ACTIVE to get a scan response. If you configure your device as GAPM_SCAN_PASSIVE, the observer only receives advertising data and doesn’t send a scan request to receive a scan response, so you will not able to read your scan response data. I’ve also tested this using an observer and the ble_app_barebone, I was able to get the increment in the advertising string or in the scan response data.

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你好，鲁奇·帕特尔，

As I have pointed out in a previous post, you are not able to define more than one USER_ADVERTISE_DATA, because the #define “USER_ADVERTISE_DATA” is appended into the .NVDS_TAG_APP_BLE_ADV_DATA item of nvds_data_storage structure. The advertising string has 31 byte length, but 3 bytes of them are reserved from the stack, the advertising filter policy and the advertising data length, so you are able to use up to 28bytes. The data that are appended into the advertising string will be populated by user_app_adv_start with the procedure I have already mentioned in a previous post. In case you want to add your custom data into the advertising string you should copy them into the correct array of the cmd which is into user_app_adv_start() function. The cmd is created by app_easy_gap_undirected_advertise_get_active(). In your application you can have the USER_ADVERTISE_DATA empty and copy your data into the advertising string. The custom data should be valid and should follow the structure of USER_ADVERTISE_DATA, as in order to start advertising correctly. You should have 2bytes as length and flag into your data, so finally you are able to append up to 26bytes into the advertising string. In the following code, I will present you how you can do that.

void user_app_adv_start(void)
{

uint8\u t advdata[28]={0x1B，0xFF，0x31，0x32，0x33，0x34，0x35，0x36，0x37，0x38，0x39，0x31，0x32，0x33，0x34，0x35，0x36，0x37，0x38，0x39，0x31，0x32，0x33，0x34，0x35，0x36，0x37，0x38}；

//安排下一次广告数据更新
app_adv_data_update_timer_used = app_easy_timer(APP_ADV_DATA_UPDATE_TO, adv_data_update_timer_cb);

struct gapm_start_advertise_cmd* cmd;
cmd = app_easy_gap_undirected_advertise_get_active();

memcpy(cmd->info.host.adv_data, advdata , 28);

//动态添加特定于制造商的数据
//mnf_data_update();
app_add_ad_struct（cmd，&mnf_data，sizeof（struct mnf_specific_data_ad_structure））；

app_easy_gap_undirected_advertise_start();
}

如果将26字节的数据添加到播发字符串中，并希望填充其他数据，则可以将它们附加到扫描响应数据中，但在另一侧，观察者应配置为GAPM\u scan\u ACTIVE，以便发送扫描请求。

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