Questions about Multi-NUS code

[ropz]

Hi I am currently using NORA-B106 based on nrf5340 to work on ble multilink things. For right now I can do multiple connections by adding several scanning filters. But I cannot discover several service by using bt_gatt_dm_start() functions. It will shows some errors like this: could not start the discovery procedure for my_service2, error code: -120. This means socket has already been connected. I have no ideas on this. I have also create different discovery callbacks for different service but still can only discover one service. What do I need to do with Multi-NUS code. 

[Vidar Berg]

Hi,

It is not possible to perform multiple discovery procedures in parallel. Therefore, you need to wait for the discovery callback before calling bt_gatt_dm_start() again. You can see how it is done in the peripheral ANCS sample where the Discovery module is used to discover both the GATT and ANCS service.

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/bluetooth_services/gatt_dm.html#api_documentation 

Best regards,

Vidar