Hi,
I have an application with custom boards using nRF54L15 (running ncs 2.9.1) as the peripheral and currently a modified nRF9160DK (running ncs 2.5.1) as the central, which connects to multiple peripherals at a time. I am noticing quite some disconnects happening in (unattended) field tests, and I would like to understand if there is a way to diagnose/fix these. I already started adding more logging of metrics so I have more context, and this is what I have so far.
# Connection parameters CONFIG_BT_PERIPHERAL_PREF_MIN_INT=400 CONFIG_BT_PERIPHERAL_PREF_MAX_INT=400 CONFIG_BT_PERIPHERAL_PREF_LATENCY=2 CONFIG_BT_PERIPHERAL_PREF_TIMEOUT=1000
There are no resets happening on the peripheral/central side, and the RSSI is pretty stable, with the 10% quantile for the device that is furthest away at a stable -80dBm. I know this is on the low end, but I assume it should still be high enough for a stable connection. In this case, the central has 4 peripherals connected to it. The disconnects occur for all peripherals, but at widely different (random) intervals.
Could you give me any pointers on what could be going wrong and how I can try to identify it? It's hard for me to get a sniffer trace as this field test is happening unattended at a public site, and the occurence of the disconnects is pretty random and can take some time before they start happening.
Best,
Wout