https://devzone.nordicsemi.com/f/nordic-q-a/8346/connect-intervali use s110 send notification to s120,and set connect interval with 7.5ms,but in actually the connect interval is 15ms!!I see s120 softdevice specification,s120 as client which can Simultaneous receive otification and send Write command in 21kps witchen-USTelligent Community 13Fri, 24 Jul 2015 09:47:32 GMThttps://devzone.nordicsemi.com/thread/30232?ContentTypeID=1Fri, 24 Jul 2015 09:47:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f73b32d5-8db4-4bae-84e7-9dc53e840231Petter Myhre<p>What have you set the minimum and maximum connection interval to on the peripheral and the central? You will only get the 21 kbps with 7.5 ms, with 15 ms you will get half, 10.65 kbps.</p><div style="clear:both;"></div>