How do I use Wireshark to see the connection interval negotiated between my nRF51822 peripheral and a central which is a mobile app? Which messages should I be looking for?
I realise it's also possible to check what gets passed to the BLE event handler on BLE_GAP_EVT_CONN_PARAM_UPDATE, but I think using Wireshark will be easier.
Also interested to see what other people have found Android and iOS app centrals to prefer for the connection interval.