Debugging
Serial Console
System Serial is located on PI-5 bus (11x2 GPIO header).
TXD: Pin 6 (Yellow cable) (Connect to RXD on Serial adapter)
RXD: Pin 8 (Orange cable) (Connect to TXD on Serial adapter)
GND: Pin 10 (Black cable) (Connect to GND on Serial adapter)
The default baudrate is 1500000, note that not all serial adapters support this high baudrate.