https://devzone.nordicsemi.com/f/nordic-q-a/100154/lpn-terminated-friendship-no-response-from-friend-after-6-retries-ran-out-of-retransmit-attemptsHi, We have a device running on a nrf52840 which is a Low Power Node and it has a friend. The device is using zephyr set on the branch v3.3.0-branch . When a message is transmitted from the friend to the LPN, the poll timeout is repeated 6 timesen-USTelligent Community 13Mon, 29 May 2023 13:50:56 GMThttps://devzone.nordicsemi.com/thread/427994?ContentTypeID=1Mon, 29 May 2023 13:50:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a9efa6f-2950-4f0d-a526-16dc73ffad0dViny<p>Hi, </p> <p>To solve the issue we have to modify the configuration of the friend node<br /><span id="LC70" class="line" lang="conf"><span class="n"></span></span></p> <p><span id="LC70" class="line" lang="conf"><span class="n">CONFIG_BT_MESH_FRIEND_LPN_COUNT</span>=<span class="m">10</span> </span></p> <p><span id="LC71" class="line" lang="conf"><span class="n">CONFIG_BT_MESH_FRIEND_RECV_WIN</span>=<span class="m">25</span></span></p> <div class="diff-grid-row diff-tr line_holder"> <div id="d1784ec3d669078857f6a9704151e260c945db36_72_72" class="diff-grid-left left-side" data-testid="left-side" data-interop-type="new" data-interop-line="72" data-interop-new-line="72"> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span id="LC72" class="line" lang="conf"><span class="n">CONFIG_BT_EXT_ADV_MAX_ADV_SET</span>=<span class="m">10</span></span></div> </div> </div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n"></span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span id="LC73" class="line" lang="conf"><span class="n">CONFIG_BT_MESH_ADV_EXT_FRIEND_SEPARATE</span>=<span class="n">y</span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n"></span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n"></span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n">Using zephyr 3.3, we were able to see an improvement of the power consumption even with a longer receive window.</span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n"><a href="https://docs.zephyrproject.org/latest/kconfig.html#!CONFIG_BT_MESH_ADV_EXT_FRIEND_SEPARATE"><span id="LC73" class="line" lang="conf">CONFIG_BT_MESH_ADV_EXT_FRIEND_SEPARATE</span></a> : Using the separate extended advertising set makes the Friend node send friendship messages as close to the start of the ReceiveWindow as possible, thus reducing the scanning time on the Low Power node.</span></span></div> <div class="diff-td line_content with-coverage left-side new" data-testid="left-content"><span class="line" lang="conf"><span class="n"></span></span></div><div style="clear:both;"></div>