https://devzone.nordicsemi.com/f/nordic-q-a/25891/nrf52-fall-project-when-mitm-1SDK13, S132 Project stopped after start. I use standart initialization: static void peer_manager_init(void) { ble_gap_sec_params_t sec_param; ret_code_t err_code; err_code = pm_init(); APP_ERROR_CHECK(err_code); memset(&amp;sec_param, 0, sizeofen-USTelligent Community 13Fri, 13 Oct 2017 07:23:36 GMThttps://devzone.nordicsemi.com/thread/101964?ContentTypeID=1Fri, 13 Oct 2017 07:23:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0570d7c5-ad6c-4041-97ef-a371e095dcb1Sigurd<p>Hi,</p> <p>Please take a look at the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v13.0.0/lib_pm_usage.html?cp=4_0_2_3_1_6_2_1#lib_pm_usage_security">Peer Manager Security parameters page here</a> for a list over required security parameters for common use cases. You can use MITM without passkey entry, if you use OOB(out-of-band) bonding.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/101963?ContentTypeID=1Thu, 12 Oct 2017 14:33:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:05268980-4b73-4751-856a-dcf1a03dc6afMikhail<p>addition: I use</p> <pre><code>#define BLE_GAP_IO_CAPS_NONE 0x03 /**&lt; No I/O capabilities. */ </code></pre> <p>can I use MITM with this setting? I want use MITM without any passkey entry.</p><div style="clear:both;"></div>