Send commands to 2 different groups in BLE Multi-link

RE: Send commands to 2 different groups in BLE Multi-link

haakonsh — Wed, 24 Apr 2019 09:08:59 GMT

If you know the names of your devices beforehand then you can add them to the Scanner modules name filter. That way you will only receive advertising reports from those devices and you can then choose to connected to those devices. See Scanning Module docs and Scanning Module API reference.

I belive sd_ble_gap_device_name_get will only return the name of the device that is executing that function.

RE: Send commands to 2 different groups in BLE Multi-link

HDuc — Mon, 15 Apr 2019 14:12:44 GMT

Hi haakonsh,

Thank you for your answer

Could you explain more detail about: "A control characteristic can be used to assign a group or role to the peripherals, and one or more characteristics can be used to transfer data to the various groups or roles."

In fact, I have an idea to realize my example. I need to get the device name of the peripheral from the advertising report. I have tried some ways (for example, call "sd_ble_gap_device_name_get" or search inside "nrf_ble_scan_on_adv_report") but failed. Could you show me how to do that. Ideally, I would like to get the device name of the '_evt->conn_handle' inside "_EVT_DISCOVERY_COMPLETE".

RE: Send commands to 2 different groups in BLE Multi-link

haakonsh — Mon, 15 Apr 2019 12:53:40 GMT

Mesh networks requires some nodes that are always in radio receive mode, so if you can't use a few devices to relay the information to leaf nodes then mesh is not suitable for you. BLE Mesh networks does use encryption through the provisioning process, where a Provisioner device decides who gets to join the network, this provisioning process can be done OOB like of NFC.

If mesh is not a good fit then you need to create a suitable GATT service, and base the UUID filtering on this service's UUID. A control characteristic can be used to assign a group or role to the peripherals, and one or more characteristics can be used to transfer data to the various groups or roles.

RE: Send commands to 2 different groups in BLE Multi-link

HDuc — Fri, 12 Apr 2019 09:38:51 GMT

Hi haakonsh,

I don't want to use mesh because I need to load many functions on the peripheral devices (for example NFC BLE pairing). So, I would like a solution as simple as possible. On the other hand, it looks like that BLE Mesh will consume much more power than BLE SDK.

RE: Send commands to 2 different groups in BLE Multi-link

haakonsh — Fri, 12 Apr 2019 09:03:22 GMT

If you intend to use GATT then you need to create a service that fits your use case.

Why can't you use Mesh?