https://devzone.nordicsemi.com/f/nordic-q-a/12723/bootloader-issue-when-using-customboardhello, I have a custom board which works fine with SoftDevice+Application , but if i Combine a boot loader hex that i complied it doesn&#39;t work. But the same ( bootloader+application+softdevice ) works fine in the board pca10028. my custom boarden-USTelligent Community 13Wed, 23 Mar 2016 14:31:37 GMThttps://devzone.nordicsemi.com/thread/48320?ContentTypeID=1Wed, 23 Mar 2016 14:31:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36348f43-f489-4389-afd3-d6029abcd85bBrook Gebremedhin<p>After modifying the linker file it worked. since the linker file was for 32k . Now am having problem with DFU wit FOTA</p> <p>check here <a href="https://devzone.nordicsemi.com/question/72826/boot-loader-issue-fota-application-fail-customboard/">devzone.nordicsemi.com/.../</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48318?ContentTypeID=1Wed, 23 Mar 2016 09:42:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36158e26-e448-4040-9d14-d98544011d00Brook Gebremedhin<p>yes i needed to change the ram size from the linker file , after that it is working fine. but the du mode from the application is not working. am not sure if i have to change anything from the linker file</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48317?ContentTypeID=1Tue, 22 Mar 2016 16:10:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0def65a3-92ce-42ce-b7e7-06d825ed2571Brook Gebremedhin<p>my small chip is 16kb ram , so what could be the issue ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48319?ContentTypeID=1Tue, 22 Mar 2016 15:42:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:18baf2aa-a72f-4ff2-8e09-5b208f71345asidekick<p>Maybe <a href="https://devzone.nordicsemi.com/question/39853/dfu-ota-issue-on-nrf51822aa/">this</a> will help. I too have a custom board which does not have any external oscillator and Bootloader + Softdevice + application works fine for me.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48316?ContentTypeID=1Tue, 22 Mar 2016 15:26:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5bb87a55-7a24-4bd4-b79b-ce0997b1e158Wojtek<p>I still don&#39;t know which revision you have, but having 16kb ram may be an issue. check <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/compatibility_matrix/nRF51822_ic_revision_overview.html?cp=2_0_1">this</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48315?ContentTypeID=1Tue, 22 Mar 2016 15:23:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:db183b3a-e984-4306-b82e-0db241990439Brook Gebremedhin<p>the chip version nRF51822CEAA</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48314?ContentTypeID=1Tue, 22 Mar 2016 15:13:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:328b48b3-441a-494d-b14a-62b5cb3a6ff6Wojtek<p>What chip version?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48313?ContentTypeID=1Tue, 22 Mar 2016 15:11:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:85f47d3a-6a61-4fa6-8727-3db9c490ac7fBrook Gebremedhin<p>my Custom board don&#39;t have an external Oscillator , also no button . It is a small chip which uses internal Oscillator.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/48312?ContentTypeID=1Tue, 22 Mar 2016 14:58:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d0aed06c-0603-4f67-b958-c3e363a2355bWojtek<p>what chip variant you have onboard?</p><div style="clear:both;"></div>