RE: Some VR cycling APP can't recognize and connect my control point characteristic.

JohnCC — Thu, 18 Nov 2021 03:18:12 GMT

Hi Kenneth,

I fixed this issue. I found that I don't advertising Fitness profile UUID during advertising period. I only advertising Cycling power profile. Like as below

ble_uuid_t m_adv_uuids[] = {BLE_UUID_CYCLING_POWER,  BLE_UUID_TYPE_BLE};

After I add some code like as below, some VR app can recognize and connect to me.

ble_uuid_t m_adv_uuids[] = {{BLE_UUID_CYCLING_POWER,  BLE_UUID_TYPE_BLE},
                               {BLE_UUID_FITNESS_MACHINE, BLE_UUID_TYPE_BLE}};

I think that some VR app will search our capability during advertising period.

Thank you.

John

RE: Some VR cycling APP can't recognize and connect my control point characteristic.

Kenneth — Tue, 16 Nov 2021 13:12:42 GMT

Difficult to know, do you by any chance the possibilty to make an on-air sniffer log of working vs. failing?
https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE

Then I can at least look at whether there is somethin one app is trying to do that the other does not. If there is no difference to see I think it may be difficult to find out what the problem may be.

It could be possible to try the pts software from Bluetooth to verify your profile if you haven't already:
https://www.bluetooth.com/develop-with-bluetooth/qualification-listing/qualification-test-tools/profile-tuning-suite/

Kenneth