https://devzone.nordicsemi.com/f/nordic-q-a/55588/we-want-to-change-the-communication-speed-of-each-peripheral-deviceWe want to change the communication speed for each connected peripheral. *Environment Peripheral: nrf52832 Central: nrf52840 *Step 1. After the peripheral connects to Central, change the communication parameters. (sd_ble_gap_conn_param_updateen-USTelligent Community 13Mon, 16 Dec 2019 07:39:21 GMThttps://devzone.nordicsemi.com/thread/225535?ContentTypeID=1Mon, 16 Dec 2019 07:39:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:570f8598-6d76-44ba-9096-3a2b4751d303Sawada<p>I&#39;m sorry.<br />As a result of the investigation, it was not an existing defect but a defect unique to us.<br />Close this thread.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/225410?ContentTypeID=1Fri, 13 Dec 2019 14:33:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:230b60cf-cc57-459e-8bac-5b900db53142Einar Thorsrud<p>Hi,</p> <p>I have some questions:</p> <ul> <li>Do you have sniffer traces that show the problem?</li> <li>Does the&nbsp;BLE_HCI_CONNECTION_TIMEOUT happen only after updating the connection parameters? <ul> <li>And in that case, does it happen immediately after?</li> </ul> </li> <li>Is the central connected to many peripheral at a time? <ul> <li>If yes, how many?</li> </ul> </li> <li>What are the connection parameters before and after the update for the various links? <ul> <li>Does some work better than others?</li> </ul> </li> </ul><div style="clear:both;"></div>