https://devzone.nordicsemi.com/f/nordic-q-a/78485/how-to-decrease-the-ble-connection-interval-to-below-24msHi there, now I set up a BLE to connect peripheral to central via NUS service. The peripheral is a customize board with nRF52832 and the central is nRF52840 DK board. The BLE connection configuration of the peripheral is shown below. The connectionen-USTelligent Community 13Fri, 13 Aug 2021 07:10:12 GMThttps://devzone.nordicsemi.com/thread/324758?ContentTypeID=1Fri, 13 Aug 2021 07:10:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef4b04b6-5365-4bdf-959c-ea5fde42d2bbSusheel Nuguru[quote user=""]But when I scan the BLE signal with nRF Sniffer, the connection interval is about 24ms as show below.[/quote] <p>&nbsp;24 ms is in between&nbsp;MIN_CONN_INTERVAL and&nbsp;MAX_CONN_INTERVAL given as preferred connection parameters to the softdevice. This choice is made by the softdevice based on these inputs and also the peers preferred intervals also also other inputs like other active roles in the device.</p> <p>If you want lower connection interval then try to change the&nbsp;MIN_CONN_INTERVAL and&nbsp;MAX_CONN_INTERVAL even lower to try to brute that. Note that if peers do not want that low connection interval, then you might have connection timeouts or disconnects from peer.</p><div style="clear:both;"></div>