This is the same UART0 port, but with the big one, you can use 5V in/out (in “in” mode ONLY if the Blade has no other power source)

Connect “correctly”:

  • RX -> TX
  • TX -> RX
  • GND -> GND

in config:


You can change the bootloader setting to enable UART from the boot. Add this line to boot.conf and flash the bootloader:


Follow this link to the Raspberry Pi Documentation BOOT_UART value

uart-1 uart-2