Advertising multiple Services.

RE: Advertising multiple Services.

swathi p — Tue, 08 Sep 2020 13:44:17 GMT

In the Screenshot you have sent,It is the UUID of one among the services in my project.

RE: Advertising multiple Services.

Hung Bui — Mon, 07 Sep 2020 09:35:18 GMT

No I didn't run anything. I just want to point out that what YOU showed in YOUR screenshots doesn't match with the UUID that you send me.

RE: Advertising multiple Services.

swathi p — Thu, 03 Sep 2020 03:24:22 GMT

ok.I think you have tried running the attached project on android.is it?

and the UUID displayed for you is one among the UUID's that i have passed in the array.

RE: Advertising multiple Services.

Hung Bui — Wed, 02 Sep 2020 14:08:18 GMT

Hi Swathi,

The 2 screenshots I attached in my last reply was from your reply on 23rd July. You can find them here: https://devzone.nordicsemi.com/support-private/support/253505#permalink=580457

What I want to say is that I don't see you are using the UUID 8295923d-8c11-4f47-96b3-fdce570e4286 in your service(s) that you attached in the screenshot.

RE: Advertising multiple Services.

swathi p — Wed, 02 Sep 2020 11:10:21 GMT

Hi Hung Bui,

I am totally confused.How did you get that UUID displayed?Have you created a service and tested?Or you got the UUID mentioned in above screenshot from my side?

Thanks & Regards,

Swathi P

RE: Advertising multiple Services.

Hung Bui — Tue, 11 Aug 2020 09:00:46 GMT

Hi Swathi,

Thanks for the UUID but you mentioned you have 6 services how do you define them, which UUID they have? in the screenshot you provided I don't see the UUID 8295923d-8c11-4f47-96b3-fdce570e4286 being used.

For example:

RE: Advertising multiple Services.

swathi p — Fri, 07 Aug 2020 12:33:12 GMT

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/263377"]Which app did you use on iOS to test it ?[/quote]

nRF Connect.

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/263377"]Please pay attention on the UUID declaration you have. From the screenshot I saw, they look very strange. Please write down here the UUID list of your service and characteristic, would it match with what you see on Android ? [/quote]

The UUID present in array is

#define BLE_UUID_TEMPSERV_BASE_UUID {0x86,0x42,0x0e,0x57,0xce,0xfd,0xb3,0x96,0x47,0x4f,0x11,0x8c,0x00,0x00,0x95,0x82}

UUID generated is

8295923d-8c11-4f47-96b3-fdce570e4286

RE: Advertising multiple Services.

Hung Bui — Thu, 06 Aug 2020 08:56:21 GMT

There is no connection between the advertising data and the actual attribute table (available in connection). The advertising data can have one or some of the services that available in the attribute table but it's not obligatory. If you have an issue with iOS you need to describe it, I don't see that in your question.
Please pay attention on the UUID declaration you have. From the screenshot I saw, they look very strange. Please write down here the UUID list of your service and characteristic, would it match with what you see on Android ?
Which app did you use on iOS to test it ?

Please post the code where you declare your service and characteristic.

RE: Advertising multiple Services.

swathi p — Thu, 06 Aug 2020 05:04:27 GMT

Hi,

Final output is I am making services available to the user on connection.

But,My question is weather the way I have implemented is right or not?

On android I am able to discover all services on connection.When I try testing on iOS only the service which is in advertising packet is available on connection.

I want this to implement on both iOS and Android.

If this approach is right what might be the reason that only one service is available on connection.If approach is wrong then what might be the right way to implement for making all the services available to user at a time.

Thanks & Regards,

Swathi P

RE: Advertising multiple Services.

Hung Bui — Wed, 05 Aug 2020 15:28:13 GMT

I really don't understand you. The user can access all 6 services when they connect.

Why do you need to have the service to be advertised ?

When it's not in the advertising packet what would be the problem ?

You can build your app to detect your device when there is for example matched name, or matched data in advertising packet.

RE: Advertising multiple Services.

swathi p — Wed, 05 Aug 2020 14:17:19 GMT

The reason is I want to make all 6 services available to user at a time.

RE: Advertising multiple Services.

Hung Bui — Wed, 05 Aug 2020 13:57:20 GMT

Hi Sawthi,

Yes it's correct. You advertise with one service.

But you still can have 6 services in the attribute table when in connection. No problem with that.

Why do you need to advertise with all 6 services ?

RE: Advertising multiple Services.

swathi p — Wed, 05 Aug 2020 08:58:56 GMT

Hi,

The below are the attachments.

I can understand from those captures that only one Service is getting advertising.Is that right?If So,How Am I able to operate 6 services after getting connected?

Thanks & Regards,

Swathi P

RE: Advertising multiple Services.

Hung Bui — Mon, 03 Aug 2020 14:33:29 GMT

Hi Swathi,
I'm sorry for late response, I was on vacation.

The advertising packet data is what you see in the Scanner panel, not when you connected to the device.

For example here:

And here raw data

You can find that the device advertising with one 128 bit UUID service and the device name Seos

Please try capture the same with your device, in the Scanner panel.

RE: Advertising multiple Services.

swathi p — Sat, 01 Aug 2020 03:37:26 GMT

Hi,

Please Suggest me on my last reply.

Thanks & Regards,

Swathi P.

RE: Advertising multiple Services.

swathi p — Sat, 25 Jul 2020 09:30:33 GMT

Thank you for the response.

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/261542"]So what you are doing is fine. But I'm seeing multiple different UUID bases in your screenshot. When in your code all of the base are BLE_UUID_TYPE_VENDOR_BEGIN. Please double check. [/quote]

These are the UUID's Iam passing through array.

static ble_uuid_t m_adv_uuids[] = {
{BLE_UUID_CURRENT_TIME_SERVICE, BLE_UUID_TYPE_BLE},
{BLE_UUID_BATTERY_SERVICE, BLE_UUID_TYPE_BLE},
{BLE_UUID_TEMP_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN},
{BLE_Notif_UUID_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN},
{BLE_UUID_RTC_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN},
{BLE_UUID_HEATER_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN},
};

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/261542"]I think there is a misunderstanding of what "advertising packet" is. What you showed in the screenshots are the attribute table, not the advertising packet(s). [/quote]

May I know what would be the best way to capture advertising packet(s)?

Thanks & Regards,

Swathi P

RE: Advertising multiple Services.

Hung Bui — Fri, 24 Jul 2020 09:15:46 GMT

Hi Swathi,

I think there is a misunderstanding of what "advertising packet" is. What you showed in the screenshots are the attribute table, not the advertising packet(s).

So what you are doing is fine. But I'm seeing multiple different UUID bases in your screenshot. When in your code all of the base are BLE_UUID_TYPE_VENDOR_BEGIN. Please double check.

RE: Advertising multiple Services.

swathi p — Thu, 23 Jul 2020 15:43:50 GMT

Hi,

Thank you for the response.

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/261395"]Could you show a screenshot on what you have in the advertising packet when you advertise with all services ? What's the advertising data you can see on the phone ? [/quote]

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/261395"]But we have to go back to the question, why do you need to advertise all the services in your advertising packet ? [/quote]

Because I Should make all services available to user to operate.

[quote userid="2121" url="~/f/nordic-q-a/64049/advertising-multiple-services/261395"]If you need to tell the phone which service the device has, can you do that with a coded/proprietary text? For example if you advertise it with A B C D E, meaning it has 5 services A B C D and E. It's anyway proprietary`service/protocol, isn't it? [/quote]

But How can user can access those services by implementing such way?

Thanks & Regards,

Swathi P

RE: Advertising multiple Services.

Hung Bui — Thu, 23 Jul 2020 14:09:08 GMT

Hi,

Could you show a screenshot on what you have in the advertising packet when you advertise with all services ? What's the advertising data you can see on the phone ?
You may know that when you don't use AE , the advertising packet size is limited to 31 bytes for advertising packet and 31 bytes for scan response packet.

Each 128 bit UUID is 16 bytes. How can you fit them into advertising packet ? There are many overhead needed as well.

But we have to go back to the question, why do you need to advertise all the services in your advertising packet ?

If you need to tell the phone which service the device has, can you do that with a coded/proprietary text? For example if you advertise it with A B C D E, meaning it has 5 services A B C D and E. It's anyway proprietary`service/protocol, isn't it?