https://test-devzone.nordicsemi.com/f/nordic-q-a/87848/ble-disconnection-after-30-secHi, We tried to use Connect Interval 7.5ms with MTU 88B, both central and peripheral role are 52832, but observed disconnection after 30 sec. Disconnection reason is 0x13 (Remote User Terminated Connection) and central side log as below, do you haveen-USTelligent Community 13 Non-ProductionThu, 12 May 2022 11:15:32 GMThttps://test-devzone.nordicsemi.com/thread/367578?ContentTypeID=1Thu, 12 May 2022 11:15:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:40a9a49c-b890-45c7-823c-db71a0541a6auser77782<p>Hi,&nbsp;</p> <p><span>Disconnect reason 0x13 (BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION) indicates that the remote user terminated the connection. So it indicates that the central&nbsp;device decided to disconnect for some reason. Do you have a <a href="https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE">sniffer trace</a> that shows what is happening on air?&nbsp;</span></p> <p><span>What are the values of&nbsp;NRF_SDH_BLE_GAP_DATA_LENGTH and&nbsp;NRF_SDH_BLE_GATT_MAX_MTU_SIZE you set in the sdk_config.h?</span></p> <p><span>Regards,<br />Amanda</span></p><div style="clear:both;"></div>