Hi,
I would like to know how to detect the service change of the ANCS gatt server.
Thank you! Joseph
Hi,
I would like to know how to detect the service change of the ANCS gatt server.
Thank you! Joseph
@Joseph: According to the spec of ANCS " the NC (notification consumer) should look for and subscribe to the Service Changed characteristic of the GATT service in order to monitor for the potential publishing and unpublishing of the ANCS at any time."
What it means is the client should enable indication on the service changed characteristic. And it will receive an indication (BLE_GATTC_EVT_HVX event) when there's a service change.
[EDIT] changed from "need to" to "should"
Hello Hung, thank you for your suggestions. If we want to subscribe to the service changed indication, the first step is to use the function sd_ble_gattc_primary_services_discover() to search for the Generic Attribute (0x1801), is that correct? Thanks!
Hello Hung, thank you for your suggestions. If we want to subscribe to the service changed indication, the first step is to use the function sd_ble_gattc_primary_services_discover() to search for the Generic Attribute (0x1801), is that correct? Thanks!