https://devzone.nordicsemi.com/f/nordic-q-a/3392/sd120-fails-assertion-while-scanningI have an application that uses the nRF51822 with SD110 version s110_nrf51822_7.0.0 as peripheral and the nRF51822 with SD120 version s120_nrf51822_1.0.0 as central. I&#39;ve run into an issue where the central device soft device calls the following assertingen-USTelligent Community 13Thu, 07 Aug 2014 07:31:23 GMThttps://devzone.nordicsemi.com/thread/12318?ContentTypeID=1Thu, 07 Aug 2014 07:31:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:18242fee-b704-4959-bae8-505df20b0c4e&#216;yvind<p>Are you sure all members of m_scan_params are initialized?</p> <p>Would it be possible to read out the addr_count and irk_count variables when this happens?</p> <p>Which module are you using? Would it be possible to test this on other modules as well?</p> <p><strong>Edit 2014-08-11:</strong></p> <p>From your edits, it looks like you are trying to run the S120 SoftDevice on older hardware for which it is not supported. From the error that you see, it looks like the assert is due to this incompatibility. We highly recommend following the compatibility matrix in nWP-018.</p><div style="clear:both;"></div>