Serial Ports

nXPico W has the same serial ports as nXPico, on the same pins — WiFi lives on the CYW43 chip and takes no UART away.

Port	Peripheral	Pins	Available to the application
COM1	USB-CDC	micro-USB	No — CODESYS gateway
COM2	UART0	GP12 TX / GP13 RX, direction on GP18	Yes
COM3	UART1	GP4 TX / GP5 RX	Yes

The full reference — how to open a port, read and write without blocking the PLC cycle, and what happens to the boot log when you open COM2 — is on the nXPico Serial Ports page. It applies here unchanged.