Central Multilink: how to add custom characteristic uuid?

RE: Central Multilink: how to add custom characteristic uuid?

Gandalf — Wed, 04 Apr 2018 12:49:54 GMT

Hi Ketil,

thank you for the information.

Don't worry, me too for the holiday 🙂

I solved by using sd_ble_uuid_vs_add() for all vendor specific UUIDs and characteristics and I incremented the memory of the SoftDevice.

Thank you!!

RE: Central Multilink: how to add custom characteristic uuid?

ketil — Tue, 27 Mar 2018 08:51:44 GMT

Hi Gandalf,

Sorry for the late reply. We are in the middle of a holiday and answers might be slow.

Yes, you should use the sd_ble_uuid_vs_add() function for all your vendor specific UUIDs, including characteristics. Note that you will have to tell the SoftDevice to reserve memory for these additional UUIDs with vs_uuid_count. Please take a look at this post for example code.

Ketil

RE: Central Multilink: how to add custom characteristic uuid?

Gandalf — Mon, 26 Mar 2018 09:54:56 GMT

Hi all,
Please could someone help me?

I'm working side "multilink central" and I already have a working sensor to connect with.

I need to discover the custom sensor profile but I only get characteristic.uuid.uuid = 0x00 and characteristic.uuid.type = 0x00 when I receive the event BLE_DB_DISCOVERY_COMPLETE. This is probably because I didn't set the configuration properly of the 4 UUIDs at 128bits of characteristics.

The custom sensor profile consist of 1 custom service at128bits and "4 custom characteristics at 128bits". Each characteristic has different uuid at 128bits even from custom service uuid at 128bit.

Do I need to use the sd_ble_uuid_vs_add to add the 4 UUIDs at 128bits characteristics? If yes, how should I do it?

Thank you in advance.

RE: Central Multilink: how to add custom characteristic uuid?

Gandalf — Mon, 19 Mar 2018 13:23:05 GMT

Hi Ketil,
I sent by private message the custom service at 128 bits of the sensor.

Please could you tell me if I set in correct way the define

#define LBS_UUID_BASE
#define LBS_UUID_SERVICE

Thank you in advance

RE: Central Multilink: how to add custom characteristic uuid?

Gandalf — Fri, 16 Mar 2018 09:10:00 GMT

Hi,

yes I modified ble_lbs_on_db_disc_evt it but the problem is I'm reading characteristic.uuid.uuid = 0x00 and characteristic.uuid.type = 0x00 when I receive the event BLE_DB_DISCOVERY_COMPLETE. This is probably because I didn't set the configuration properly of the 4 UUIDs at 128bits of characteristics.

Do I need to use the sd_ble_uuid_vs_add to add the 4 UUIDs at 128bits characteristics? If yes, how should I do it?
Thank you in advance.

RE: Central Multilink: how to add custom characteristic uuid?

ketil — Fri, 16 Mar 2018 08:34:37 GMT

Hi again,

Have you added the UUIDs for your characteristics in ble_lbs_on_db_disc_evt? If not the central will look for the UUIDs of the Blinky LED and Button characteristics.

Ketil

RE: Central Multilink: how to add custom characteristic uuid?

ketil — Wed, 14 Mar 2018 13:33:02 GMT

Hi,

My bad. I will need to look further into this. Will let you know once I figure it out.

Ketil

RE: Central Multilink: how to add custom characteristic uuid?

Gandalf — Wed, 14 Mar 2018 12:01:32 GMT

Hi Ketil,

thank you for your answer, but is this tutorial referred to peripheral side?
I'm working side "multilink central" and I already have a working sensor to connect with.

I need to discover the custom sensor profile but I only get characteristic.uuid.uuid = 0x00 when I receive the event BLE_DB_DISCOVERY_COMPLETE.

The custom sensor profile consist of 1 custom service at128bits and "4 custom characteristics at 128bits". Each characteristic has different uuid at 128bits even from custom service uuid at 128bit.

Do I need to add something else regarding the 4 custom characteristics at 128 bits inside ble_lbs_c_init or somewhere else?

Thank you in advance.

Best regards

RE: Central Multilink: how to add custom characteristic uuid?

ketil — Wed, 14 Mar 2018 10:03:48 GMT

Hi Gandalf,

Custom services and characteristics can be difficult to understand and work with. I think everything you need to solve your question is answered in the Custom Service Tutorial. Let me know if you can't figure it out after reading the tutorial and I will take a closer look.

Ketil