service and characteristics not updating after switching example projects

RE: service and characteristics not updating after switching example projects

Vidar Berg — Tue, 26 Jun 2018 15:36:01 GMT

Hi Dan,

Disabling and re-enabling BLE in settings clears the attribute cache, and thefore forces the iphone to perform a new service discovery on the following connection. You can avoid caching by including the service changed characteristic in your attribute table. Set the NRF_SDH_BLE_SERVICE_CHANGED symbol in sdk_config to '1' to enable it.

Note: for bonded devices you need to send a service changed indication to make the central perfom a new service discovery. You can find more information about attribute caching in Bluetooth core specification, vol. 3, part G, section 2.5.2.

RE: service and characteristics not updating after switching example projects

Dan Phelan — Tue, 26 Jun 2018 15:07:02 GMT

Thanks for the suggestions. I tried the full erase and closing the phone app, but still the services and

characteristics did not update.

But what finally worked was to disable BLE on the iPhone's Settings, then re-enabled after a minute. This cleared the problem and LightBlue and the nrf Toolbox apps worked normally.

Thanks,

Dan

RE: service and characteristics not updating after switching example projects

kphalak — Tue, 26 Jun 2018 13:16:39 GMT

Its always a good practice to erase full chip before loading new firmware. May be it's in settings of your IDE.

May be stupid question but did you close the app and reopened, because it can have cache problem on phone side too.