Serial console: Blue color line: Tool Pin TXD, orange color: Tool Pin RXD, black: Tool Pin GND
To be able to boot Armbian SD card image and install Armbian to eMMC, use one of the methods to boot into upgrade mode. If you have most recent board revision (1.4 ->) then you only need to quickly press the function key (middle) 3 times in 2 seconds. Release and boot will proceed from …