On 06/02/2016 05:53 PM, Christopher Collins wrote:
On Thu, Jun 02, 2016 at 02:25:33PM +0200, Stephane D'Alu wrote:
Adding the "| BLE_GATT_CHR_F_NOTIFY" result in an error when setting
advertisement, which seems to be: pinkey missing.
105:[ts=102480ssb, mod=64 level=3] error enabling advertisement; rc=6
111:[ts=108336ssb, mod=4 level=0] Command Complete: cmd_pkts=1 ogf=0x0
ocf=0x0 status=5
I'm using bleprph (0.9-dev) as template, which is already using
BLE_GATT_CHR_F_NOTIFY for it's Alert service, and I haven't seen such
pinkey requirement. Any idea on what is wrong?
Hi Stephane,
Unfortunately, it appears you are the victim of a few red herrings :).
I will attempt to explain what is going on below. First, the solution
is to increase the max_client_configs setting by at least two, e.g.,
cfg.max_client_configs = 8;
I believe this change will make the problem go away.
Bingo!
> [...]
Finally, your email sparked a few thoughts. These are just some musings
that need some more thought, but it will help me to write them down, so
I hope you'll humor me and allow me to do so :).
1. We need better diagnostics. It would be great if a message was
printed to the debug log indicating exactly what failed when you
attempted to advertise.
2. It is too difficult to get all the configuration settings correct.
I'm wondering if we should have the application pass its service table
to ble_hs_init(). That way, the correct values for max_services,
max_attrs, and max_client_configs can all be derived from the table.
One complication here is that the application is currently allowed to
register its services in several steps (multiple calls to
ble_gatts_register_svcs(), each time passing a different table). I
suppose the options are to either a) remove support for multistage
registration, or b) maintain the current configuration behavior, and
make the new service table method optional.
I also have some difficulties to size max_attrs and max_services.
Can I propose c) Having a web-page for nimble stack
configuration/tuning, and a set of macro that describe the formula used
to compute the various configuration parameters according to the number
of services/characteristics/notifications-indications/....
Thanks
--
Stephane D'Alu
