PHY update has no effecthttps://devzone.nordicsemi.com/f/nordic-q-a/27712/phy-update-has-no-effectI&#39;m attempting to change phy in a program based on the UART example and am following the same process used in the att_mtu_throughput for changing PHY. Calling sd_ble_gap_phy_request appears to be successful, a BLE_GAP_EVT_PHY_UPDATE is generated withen-USTelligent Community 13Fri, 01 Dec 2017 14:02:32 GMTRE: PHY update has no effecthttps://devzone.nordicsemi.com/thread/109383?ContentTypeID=1Fri, 01 Dec 2017 14:02:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b065710c-c6dc-4998-89af-2c0e0b7e8341Paddy<p>Thanks for your reply, I just went to post some code and realised I wasn&#39;t checking the return value of sd_ble_gap_phy_request. I&#39;m getting &quot;ERROR 17 [NRF_ERROR_BUSY]&quot; which would explain the problem, though it seems odd to me that the PHY_UPDATE event is still triggered.</p><div style="clear:both;"></div>RE: PHY update has no effecthttps://devzone.nordicsemi.com/thread/109382?ContentTypeID=1Thu, 30 Nov 2017 13:00:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:228af2b6-e146-4ab3-9a04-043747330f0dketil<p>Hi,</p> <p>Could you please provide a code snippet? Is it the central or peripheral that initiates the change?</p> <p>Ketil</p><div style="clear:both;"></div>