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  • Case ID: 229024
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10 second delay after provision when using PB-ADV with PB-GATT enabled

JonasJ

When using the PB-ADV bearer there is a ~10 second delay after the Link is closed and the mesh stack starts working again.

This is related to my previous report https://devzone.nordicsemi.com/f/nordic-q-a/43992/10-second-delay-after-pb-gatt-completed-until-first-mesh-proxy-service-advertisement and https://devzone.nordicsemi.com/f/nordic-q-a/46583/scanner-is-disabled-after-provision-completes-with-pb-gatt-enabled-with-10-second-delay-workaround

I'm currently using the workaround suggested in the the above posts. However, while it works great for PB-GATT, it doesn't work for PB-ADV and the delay is still there.

Doing the initial workaround with scanner_disable()/scanner_enable() in nrf_mesh_disable()/nrf_mesh_enable() does actually improve the situation.

Here is a log from a node that is running a patched SDK For Mesh v3.1.0. Note the time between line 4 (Link opened) and line 15 (Provision Complete event) is ~10 seconds. I would expect that the Complete Event to happen quickly after the Link Closed Event. I've added a few more log lines to better spot where the delay is, i.e. it's waiting for the NRF_MESH_EVT_DISABLED event.

<t:      21882>, prov_bearer_adv.c  ,  400, PB-ADV: context at 0x20002CF0 added to bearer
<t:      21894>, mesh_app_utils.c   ,   65, Device UUID (raw): A6880470478AB741B644550AC49916F7
<t:      21898>, mesh_app_utils.c   ,   70, Device UUID : 700488A6-8A47-41B7-B644-550AC49916F7
<t:    1411152>, prov_bearer_adv.c  ,  849, PB-ADV: Link opened.
<t:    1413242>, prov_bearer_adv.c  ,  798, Received ACK for [ppdu1]
<t:    1419801>, prov_bearer_adv.c  ,  798, Received ACK for [ppdu3]
<t:    1426426>, prov_bearer_adv.c  ,  798, Received ACK for [ppdu5]
<t:    1428584>, prov_bearer_adv.c  ,  798, Received ACK for [ppdu6]
<t:    1432182>, prov_bearer_adv.c  ,  798, Received ACK for [ppdu8]
<t:    1432936>, mesh_provisionee.c ,  177, gatt_database_reset
<t:    1432940>, prov_bearer_adv.c  ,  904, PB-ADV: Link closed.
<t:    1740535>, mesh_provisionee.c ,   94, mesh_evt_handler
<t:    1740541>, mesh_provisionee.c ,  158, sd_state_evt_handler DISABLED
<t:    1740550>, mesh_provisionee.c ,  113, sd_state_evt_handler ENABLED
<t:    1741092>, main.c             ,   66, Successfully provisioned
<t:    1741102>, main.c             ,   76, Node Address: 0x002C

Thanks.

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