How to develop a GATT Client application?

[zhimi]

I have a central device , that acting as a gatt server. the service is customize, and 128bit- primary serivice UUID ,its characteristics' UUIDs(128bit) are all known, how to discovery the service and characteristics in nrf51822 peripheral? I don't find any examples that has above function.

[Carles]

Hi there,

128bit- primary serivice UUID ,its characteristics' UUIDs(128bit) are all known, how to discovery the service and characteristics in nrf51822 peripheral?

You need to do this in 2 steps with the S110:

1. Use sd_ble_uuid_vs_add() to add all the 128-bit UUIDs that your central uses
2. Use the GATTC functions to discovery your services characteristics, for example:

sd_ble_gattc_primary_services_discover() sd_ble_gattc_characteristics_discover()

While using the UUIDs that you previously added.

Regards,

Carles