/members-area/personalblogs/b/andy-clark-s-blog/posts/mbed-and-magic-red-lightI was in the Arduino forum the other day, in the Portenta section and I read something rather odd about a bit of MBed software. It&#39;s called, as I understand it... Serial crash dump. I have been experimenting with Arduino Portenta and an Adaf...en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/andy-clark-s-blog/posts/mbed-and-magic-red-lightSat, 23 Oct 2021 04:31:04 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8c4acc0-4369-466b-b5c5-12d60eb57fceralphjy0<p>It&#39;s been a few months since you posted this, but thanks for that debug link.</p><p>&nbsp;</p><p>I just started using my Portenta and ran into the &quot;magic red light&quot; when I was trying to add MQTT to an existing Mbed program.&nbsp; Amazing that the only recourse is to pull the power supply <span>[View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-c8c4acc0-4369-466b-b5c5-12d60eb57fce/0435.contentimage_5F00_938.png:16:16]</span>...</p><img src="https://community.element14.com/aggbug?PostID=11680&AppID=312&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/members-area/personalblogs/b/andy-clark-s-blog/posts/mbed-and-magic-red-lightTue, 24 Aug 2021 08:30:32 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8c4acc0-4369-466b-b5c5-12d60eb57fcedougw1<p>Cute but non-standard.</p><img src="https://community.element14.com/aggbug?PostID=11680&AppID=312&AppType=Weblog&ContentType=0" width="1" height="1">