Hello Dialog_Support,
1. We are configuring DA14580 MCU as abroadcastermode. So we need to dynamically changeUSER_ADVERTISE_DATAstring to send dynamically changed data. But this USER_ADVERTISE_DATA is defined in user_config.h file so we can not modify it. Is there any provision so we can modify USER_ADVERTISE_DATA in our user defined function?
2. Can we define more than one USER_ADVERTISE_DATA?
例如#define USER_ADVERTISE_DATA ("\x03"\
adv_type_complete_list_16bit_service_ids \
avd_uuid_device_information_service \
"\x11"\
adv_type_complete_list_128bit_service_ids \
“\ x2f \ x2a \ x93 \ xa6 \ xbd \ xd8 \ x41 \ x52 \ xac \ x03 \ x00 \ x0f \ x03 \ x x00 \ x0f \ xca \ xea \ x80 \ x7f”）
#define user_advertise_data1（“\ x03”\
adv_type_complete_list_16bit_service_ids \
avd_uuid_device_information_service \
"\x11"\
adv_type_complete_list_128bit_service_ids \
"\x2F\x2A\x93\xA6\xBD\xD8\x41\x52\xAC\x03\x00\x0F\xCA\xEA\x80\x00")
上面提到代码片段是可能的吗？
3.如果我们想发送超过广告ckets with different payloads then do you have any example code?
4.如何更改广告数据包传输速率？
嗨Ruchi Patel.
Please check the ble_app_barebone example of the SDK which demonstrates dynamically change of user advertising data. Yes, you can send more than 1 advertisement packets with different payloads. The ble_app_barebone example demonstrates that functionality, too. The advertising string should have a specific format, like . The blocks of code that you have posted have this format, so it is possible to do that. The advertisement packet transmission rate can be customized in the user_undirected_advertise_conf structure of
user_config.h file. The advertising packets are transmitted in specific advertising intervals which can be changed in that structure
谢谢pm_dialog.
你好pm_dialog，
感谢您的及时答复。这很有帮助。
I have few more questions are there.
1.我已经检查了BLE_APP_BAREBONE示例。在此，只有制造广告数据正在发生变化。如果我们想在用户文件中修改其他字节的广告数据，那么我们如何修改？你有这个例子吗？
2. I have not found user_undirected_advertise_conf structure in ble_app_barebone example so can you tell me in which example this structure is defined?
3.我想配置一个传输广告数据包的广播公司。我们可以修改此广告数据包。我们应该能够修改超过1个字节的广告数据。所以你能引导我如何开始这个吗？
感谢致敬，
Ruchi.Patel
嗨Ruchi Patel.,
You can configure the advertisement packet transmission rate by changing the .intv_min or .intv_max menbers of user_adv_conf structure, which is defined in user_config.h. In this way, you can define the minimum and maximum intervals for advertising. Regarding the advertising data, you are able to modify not only the manufacturing advertising data. Also you able to modify more than 1 bytes of advertising data. The ble_app_barebone example of the SDK changes the propriety data of the advertising string dynamically. The propriety data have 2 bytes length in the specific example, but the length of them can be changed. In the advertising string you can append your specific data and update them from your application. The advertising message is created in app_easy_gap_undirected_advertise_start_create_msg() function and then is saved in the cmd structure when the app_easy_gap_undirected_advertise_get_active() function is invoked. The cmd pointer will have a full message that you can send to the stack including some default adv data taken from the USER_ADVERTISE_DATA, so what you can do is after the app_easy_gap_undirected_advertise_get_active() returns, target the array in the cmd pointer that holds the advertising data (cmd->info.host.adv_data) and change them as you like – your data will have to be according to the BLE specification.
谢谢pm_dialog.
Hello PM_dialog,
Thank you for the reply. Now I am able to send more than 1 bytes in USER_ADVERTISE_DATA. Next I want to do role switch between observer and broadcaster. I have two individual applications: one as a broadcaster and other as a observer. Previously i have done role switching between peripheral and central. So i have tried to configure this but my application goes into nmi_handler as i run the application. Can you suggest me that is there any extra changes required?
感谢致敬，
Ruchi.
嗨Ruchi Patel.,
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.
谢谢pm_dialog.
Hello Dialog_Support,
感谢你的回复。现在我能够将角色从观察者切换到广播公司，反之亦然。
我在我的第一个帖子中问道Can we define more than one USER_ADVERTISE_DATA?. I am able to define it in user_config.h file. But how to call it? I mean nvds.c file has the nvds_data_struct structure in which USER_ADVERTISE_DATA has been called. But if i want to call USER_ADVERTISE_DATA and USER_ADVERTISE_DATA1 both then where i can call in user space? As nvds.c file is SDK's common file so i can not modify it.
2.我有一个广播设备，其中我正在修改作为user_advertise_data的一部分的制造数据并开始广告。在另一端我有另一个是观察者的设备。在观察者侧，我得到了user_advertise_data报文，但我没有得到制造数据。我使用BLE Scanner应用程序检查，在我获得制造数据。如何在观察者设备侧接收此制造数据？
感谢致敬，
Ruchi.
Hi Ruchi Pate,
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.
关于制造商数据，当设备处于Observer模式时，.app_on_adv_report_ind Ind Callback函数（在user_callback_config.h文件中）将执行，因此它不应该为null，您应该定义要触发的函数。收到GAPM_ADV_REPORT_IND时，将执行GAPM_ADV_REPORT_IND_HANDLER（）执行.app_on_adv_report_ind IND回调。此处理程序具有输入参数The GapM_Adv_Report_ind结构，包括Adv_report结构。制造商数据应该是ADV_REPORT调节的数据[ADV_DATA_LEN]项。那么你如何检查没有收到制造商数据，并且所有其他数据都正确收到？
谢谢pm_dialog.
你好pm_dialog，
1. In user_config.h file, I will keep USER_ADVERTISE_DATA as empty and later I will add advertising data dynamically. But is it possible to add large number of bytes(approximately 16-20 bytes) into single USER_ADVERTISE_DATA? Let's consider I am able to broadcast large number of bytes but at the observer side, can I receive more than 31 bytes data? Right now, if broadcaster has large number of bytes in USER_ADVERTISE_DATA then at observer side I am not able to receive advertising data bytes more than 31 bytes.
2.我在user_od_adv_report_ind函数中观察数据。在这里，我正在附加该函数的代码片段。
void user_on_adv_report_ind (struct gapm_adv_report_ind const * param){
volatile static uint8_t param_data[ADV_DATA_LEN];
arch_printf("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n\r",
param-> eport.adddr.addr [5]，
param-> eport.addr.addr [4]，
param->report.adv_addr.addr[3],
param->report.adv_addr.addr[2],
param->report.adv_addr.addr[1],
param-> eport.addr.addr [0]，
param_data [0] = param-> report.data [0]，
param_data[1] = param->report.data[1],
param_data[2] = param->report.data[2],
param_data[3] = param->report.data[3],
param_data[4] = param->report.data[4],
param_data [5] = param-> report.data [5]，
这样我在读31个字节数据。我不知道the other method to read data. At broadcaster side, after 26 bytes, Manufacture data are attached. If I modify my custom data at manufacture data string and the advertising data length is more then 31 bytes then I am getting 00 at observer side but if I check the same in BLE Scanner App in Raw data section I am getting the same data which I have modified. Can you please explain me why this is happening? And if you have any other method to read USER_ADVERTISE_DATA then please let me know.
感谢致敬，
Ruchi.
嗨Ruchi Patel.,
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.
谢谢pm_dialog.
你好pm_dialog，
感谢您的答复。我正在参考BLE_APP_PERITELAL和BLE_APP_BAREBONE示例来开发我的申请。现在我想向user_advertise_data发送我的自定义数据，但该数据不适合user_advertise_data，以便我在我的前一篇文章中询问，我们可以定义多个user_advertise_data并广播它？但是在nvds.c文件中调用user_advertise_data，它是DSK的常用文件，所以我无法修改它。正如您所建议的那样，更新User_Advertise_Data，但我无法实现所以可以为我提供任何代码片段或示例代码，这些代码可以完全相同。
In short, I want to broadcast 28 bytes to 4 different observers at a time. So If I can send 7 bytes per advertising packet and 4 advertising packets i want to broadcast at a time then what configuration i need to follow? Please help me out.
感谢致敬，
Ruchi.Patel
嗨Ruchi Patel.,
正如我在上一篇文章中所指出的那样，您无法定义多个user_advertise_data，因为#define“user_advertise_data”将附加到.nvds_tag_app_ble_add_data项的nvds_data_storage结构。广告字符串具有31个字节长度，但它们的3个字节是从堆栈中保留的，广告过滤策略和广告数据长度，因此您可以使用最多28bytes。附加到广告字符串中的数据将由USER_APP_ADV_START填充，其中我在上一个帖子中已提及的过程。如果要将自定义数据添加到广告字符串中，则应将它们复制到CMD的正确数组中，该数组是user_app_adv_start（）函数。cmd由app_easy_gap_undircted_advertise_get_active（）创建。在您的应用程序中，您可以将user_advertise_data为空，并将数据复制到广告字符串中。自定义数据应该有效，并且应遵循user_advertise_data的结构，以便正确启动广告。您应该将2字节与长度和标志一起放入数据中，因此最终您能够将高达26字节追加到广告字符串中。在以下代码中，我会向您展示您如何做到这一点。
void user_app_adv_start(void)
{
uint8_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};
// Schedule the next advertising data update
app_add_data_update_timer_used = app_easy_timer（app_add_data_update_to，avd_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);
// add manufacturer specific data dynamically
//mnf_data_update();
app_add_ad_struct(cmd, &mnf_data, sizeof(struct mnf_specific_data_ad_structure));
app_easy_gap_undircated_advertise_start（）;
}
If you add 26bytes data into the advertising string and you want to populate additional data, you can append them into scan response data, but in the other side, the observer should be configured as GAPM_SCAN_ACTIVE in order to send the scan request.
谢谢pm_dialog.