I've been trying out the light_switch proxy_server example. Currently I am using a BLE debugging tool on MacOS to send raw bytes to the Mesh Proxy Data In characteristic to interact with the GATT Proxy Server in the proxy_server example. In the process I do the following:
1) In the provisioner I configure the proxy_server node to publish health_server status once every second.
2) I connect to the proxy_server node from my laptop.
3) I subscribe to the "Mesh Proxy Data Out" characteristic.
4) I send a manually encoded message on the "Mesh Proxy Data In" characteristic per Mesh Specification section 6 to configure the GATT Proxy filter to be "blacklist, no address" -- which essentially allows all packets to pass the filter.
5) After doing the steps above, I am able to receive data packets on the "Mesh Proxy Data Out" characteristic once every second (i.e. I can receive the health_server publications). Everything works exactly as expected so far.
In the process, steps 2-5 finish almost instantaneously. I then reset the proxy_server node. Upon reboot, the node recognizes that it has already been provisioned, and remembers all the provisioning data from before. I then try to repeat step 2-5 above. However, this time, the connection is very sluggish -- step 3 and 4 takes multiple seconds to finish. Moreover, for step 5, I am only able to receive a packet update every 2 seconds. This is because each packet transfer now takes ~2 seconds to finish (measured from the point when 'sd_ble_gatts_hvx()' is called in 'mesh_gatt.c' to the point when 'MESH_GATT_EVT_TYPE_TX_COMPLETE' is received in 'proxy.c'). Therefore GATT Proxy TX cannot keep up with the every-second frequency of the heath_server updates.
I have verified that the GAP connection parameters before and after the reset are the same: min_conn_interval=12, max_conn_interval=12, slave_latency=0, conn_sup_timeout=200. Since the soft device source code is not available, I'm not sure how I should proceed to debug from here. Is there a way to get more information/log on the events/timing happening in the soft device?
Thanks so much!
