RE: [nRF Connect SDK] How can I find out if HID is connected while BLE advertise NUS.

Tim Hwang — Tue, 26 Apr 2022 07:21:02 GMT

Thanks for update.

1) For "service changed service", I add following option but it was not effective for me.

CONFIG_BT_GATT_SERVICE_CHANGED=y

2) For multiple mac address.

Only one address is allowed for me.

So I decide to remove bonding at every mode change and test it.

Thanks anyway.

RE: [nRF Connect SDK] How can I find out if HID is connected while BLE advertise NUS.

Edvin — Mon, 25 Apr 2022 12:57:01 GMT

Hello,

It sounds like your phone is chaching the Bluetooth services (as most phones do). There is something called "service changed service", which you can look into, but it may not be straight forward if you are not using it as intended. I is supposed to be used with bonding, in cases where you add new services. However, this requires the phone to enable indications on the service changed service.

It may be that it is easier to use the old trick of changing the device address instead of using this service changed service, because you will be switching back and forth between two sets of services, it may be easier to pretend that you are two different devices.

See this answer form Einar on how to change BLE addresses in NCS:

Best regards,

Edvin