GATT service bt_gatt_notify argument const structbt_gatt_attr*attr

[peterkwek]

Hello,

I'm making an own service with a notify.

When I look at the bas service there is the following line to trigger the notifty:

rc = bt_gatt_notify(NULL, &bas.attrs[1], &level, sizeof(level));

Because I have serveral characteristics and the notify is not on the top.

The index of [1] should not be okay.

How can I determine the attribute index of my service?

Is there a easier way to join this, because when I add some attributes the index could change.

Greetings,

Peter

[peterkwek]

Additional.

I looked it up by comparing with the address of the variable mentioned in the characteristic

Something like this.

for( int i = 0; i < My_service.attr_count; i++)
{
	if( My_service.attrs[i].user_data == &my_notify_variable )
	{
		attr_index_notify= i;
	}
}

...

bt_gatt_notify(NULL, &My_service.attrs[attr_index_notify], &my_notify_variable, sizeof(my_notify_variable));

Is this method okay to use it like this?