espective roles,
   but must also be attached to the same UART, either UART0 or UART1.  For
   example, you can use GP0 for TX and GP1 for RX, because they're both on
   UART0.  When you look at the pin-out diagram, you'll see that some of
   the pins are labeled "UART0 TX", "UART1 TX", "UART0 RX", or "UART1 RX".
   That tells you the capability (TX or RX) and UART unit number (0 or 1).
   Pick a pair of pins with the same unit number and with the required roles.
</p>
<pre>
   {
      serialPorts: {
       