https://devzone.nordicsemi.com/f/nordic-q-a/71215/thingy91-nrf52840-how-to-increase-stack-sizeIf you take a 1K variable to a local variable, the AP will drop. Static variables do not fall off. I think it&#39;s a stack size issue, but how do I specify the stack size in prj.conf? Also, where can I find the current stack size and stack start addressen-USTelligent Community 13Thu, 04 Feb 2021 08:38:56 GMThttps://devzone.nordicsemi.com/thread/292828?ContentTypeID=1Thu, 04 Feb 2021 08:38:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67936e44-dd94-4eef-8aa5-85be440ceb97Carl Richard<p>My pleasure! Glad I could help.<br /><br />Best regards,<br />Carl Richard</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/292824?ContentTypeID=1Thu, 04 Feb 2021 08:05:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8b62669-b1a0-4dee-93ef-6ceaf518788aMakotoKoike<p>By increased the stack size, it ran normally.</p> <p>The stack size is started by examining the address of the local variable of the main function.<br />I can see the rough position.</p> <p>Thank you very much.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/292724?ContentTypeID=1Wed, 03 Feb 2021 14:44:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5ca14e0-0d42-4004-968b-adf006312a64Carl Richard<p>To see current stack size you can use the <a href="https://docs.zephyrproject.org/latest/guides/flash_debug/thread-analyzer.html#thread-analyzer">Zephyr thread analyzer module</a>&nbsp;and to find stack start address you can read the rom_report by issuing the command:&nbsp;<br /><pre class="ui-code" data-mode="text">west build -t rom_report</pre><br /><br />after building. There is a known bug with the rom_report command that can be fixed by applying the patch attached in <a href="https://devzone.nordicsemi.com/f/nordic-q-a/68775/nrf9160-size_report-seems-to-be-broken-in-latest-ncs1-4-0/282380#282380">this thread</a>.<br /><br />Best regards,<br />Carl Richard</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/292663?ContentTypeID=1Wed, 03 Feb 2021 12:14:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d81384f5-a044-4338-8e1f-47f2f669eb02Carl Richard<p>Hi!<br /><br />To increase the stack size you can add the following to your prj.conf:<br /><pre class="ui-code" data-mode="text">CONFIG_MAIN_STACK_SIZE=&lt;desired stack size&gt;</pre><br />I will check how you can find stack size and stack start address.<br /><br />Best regards,<br />Carl Richard</p><div style="clear:both;"></div>