BLE central for Komoot app service setup

[vincent.golle]

Dear Nordic,

I am trying to setup a custom BLE client service to interact with the Komoot app (Turn by turn navigation).

I can connect to the phone, and receive notifications (after CCCD request).

However, I am supposed to provide my read requests with a unique identifier (present in the previous notification) so that the phone app

can switch to the next turn indication.

I have absolutely no clue how and where to do that...

Here their github where they describe the protocol:

https://github.com/komoot/BLEConnect/tree/master

Could you please provide some guidance ?

Many thanks !

[Edvin]

Hello,

I see. It is not possible to write anything to the 503D.... characteristic. Only read and notify.

What is in the other service, starting with 89D3...? Anything you can write to there?

BR,

Edvin

[vincent.golle]

Hi Edvin,

And no, 93D3 is unrelated.

However the issue is now solved !

Contrary to what Komoot's manual states, there is no need to write the identifier back to the characteristic.

It is enough to read the characteristic upon notification.

If in the future anybody using the nRF wants to use the Komoot app, they can just refer to my code:

https://github.com/vincent290587/ble_services

[Edvin]

Hello, and happy new year!

Glad to see that you figured it out, and thank you for sharing, as it can be useful for others working with the same app.

Best regards,

Edvin