Hi, Recently, there are some request for Celadon platform UART trace, I made a wiki below for UART trace for 3 Celadon platforms, APL-NUC, KBL_NUC, WHL RVP. https://wiki.ith.intel.com/display/ANDROIDSI/Celadon+Serial+debug+logs+ou... Note: For KBL_NUC and WHL RVP, UART logging is started from Power on. For APL_NUC, due to there is no hardware interface, UART log is started after kernel usb device is enumerated. @Yogesh, could you help add below requirement to 3 platforms? as we are supporting UART logging for Celadon. https://rtc.intel.com/dng0001001/web#action=com.ibm.rdm.web.pages.showArt... If you have any questions regarding UART logging, please let me know. Thanks Tim