SWD and Serial Connect PI PICO 8(GPIO 14: TXD) 2(GPIO 1) 10(GPIO 15: RXD) 1(GPIO 0) 14(Ground) 3(Ground) 18(GPIO 24) 41?(D3: SWDIO) 20(Ground) 42?(D2: Ground) 22(GPIO 25) 43?(D1: SWCLK)