https://devzone.nordicsemi.com/f/nordic-q-a/79646/s140-v6-1-1-scan-does-not-time-outHi! I have a question regarding the scan timeout. The situation is the following: On a nRF52840, I repeatedly perform scans every 120s (which is controlled by a CC Interrupt on the RTC). The scan should time out after 17s, which works well for a littleen-USTelligent Community 13Thu, 30 Sep 2021 07:23:51 GMThttps://devzone.nordicsemi.com/thread/331838?ContentTypeID=1Thu, 30 Sep 2021 07:23:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23a81ee7-f8ec-45ad-9f89-53fa908a61b0Luca Lattanzio<p>Hi Amanda. Just wanted to give everybody an update: I did two things to fix the issue. First, I used an app timer to &quot;manually&quot; stop the scanning procedure after the required amount of time. While this seemed to work at first glance, I noticed that after some time I wasn&#39;t able to receive any advertising packets after a while (no more BLE_GAP_EVT_ADV_REPORT events). So I did some more research and found this:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/50017/nrf52832-ble-scanning-event-not-triggered-after-some-time-randomly-like-1hour-3-hour">https://devzone.nordicsemi.com/f/nordic-q-a/50017/nrf52832-ble-scanning-event-not-triggered-after-some-time-randomly-like-1hour-3-hour</a></p> <p>This seemed to describe my problem pretty well. After applying the suggested changes from this post, scanning works without any problems.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/329603?ContentTypeID=1Wed, 15 Sep 2021 12:05:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21e65d4e-892d-43ad-a5cf-c1d431cdbf12Amanda Hsieh<p>Hi Luca,&nbsp;</p> <p>If you have set timeout to a non-0 value, then you should get a timeout, however, the actual timeout depends on whether you are scanning or connecting:</p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___c_e_n_t_r_a_l___c_o_n_n___m_s_c___l_e_g_a_c_y.html">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___c_e_n_t_r_a_l___c_o_n_n___m_s_c___l_e_g_a_c_y.html</a>&nbsp;</p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___s_c_a_n___m_s_c___l_e_g_a_c_y.html">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___s_c_a_n___m_s_c___l_e_g_a_c_y.html</a>&nbsp;</p> <p></p> <p><a title="Invalid state, operation disallowed in this state." href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.3.0/group__nrf__error.html#gaf0aff2ba7864b34a36b4a96986e1851e">NRF_ERROR_INVALID_STATE</a>&nbsp;returned by <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.3.0/group___b_l_e___g_a_p___f_u_n_c_t_i_o_n_s.html#ga0e92b62656057a13747a2ef1e71fd128"><span>sd_ble_gap_scan_stop</span></a>&nbsp;means&nbsp;<span>Not in the scanning state.&nbsp;</span></p> <p><span></span></p> <p><span>Regards,<br />Amanda</span></p><div style="clear:both;"></div>