https://devzone.nordicsemi.com/f/nordic-q-a/43837/increasing-latencyHi, i use SDK 15.0.0 ble_app_uart_pca10056_s140 nrf52840 I set BLE parameters like this: #define MIN_CONN_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) #define MAX_CONN_INTERVAL MSEC_TO_UNITS(12.5, UNIT_1_25_MS) #define CONN_SUP_TIMEOUT MSEC_TO_UNITSen-USTelligent Community 13Tue, 19 Feb 2019 13:08:37 GMThttps://devzone.nordicsemi.com/thread/171891?ContentTypeID=1Tue, 19 Feb 2019 13:08:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c4e50004-593c-4493-a92c-9e208ef2f5dcEinar Thorsrud<p>Hi,</p> <p>I assume there is a typo, and that 3.5 ms is not the latency you expect? After all, 7.5 ms is the minimum connection interval in BLE.</p> <p>In any case, it sounds like the connection interval is gradually being increased by the Android phone. A sniffer trace could confirm whether this is the case or not. The connection interval is determined by the central, though a peripheral can request a change. Assuming this is the problem, you could try to always request a connection parameter update whenever the connection interval becomes larger than what you would like.</p><div style="clear:both;"></div>