The UART pins are as follows:https://pinout.xyz/pinout/uartthe PL011 uart has hardware flow control supportIm not sure does the built in UART have hardware flow control? If not I suspect I'll have to use the GPIO pins...
omly shows spi having rts and cts which I understand as hw flow control
GPIO 14 TXD0/TXD1
GPI0 15 RXD0/RXD1
GPIO 16 CTS0/CTS1
GPIO 17 RTS0/RTS1
I used the pinctrl command to see the available pin functions for those pins (on my Pi Zero W)
Code:
rpdom@raspi14:~ $ pinctrl funcs 14-1714, GPIO14, TXD0, SD6, DPI_D10, AVEOUT_VID10, AVEIN_VID10, TXD115, GPIO15, RXD0, SD7, DPI_D11, AVEOUT_VID11, AVEIN_VID11, RXD116, GPIO16, FL0, SD8, DPI_D12, CTS0, SPI1_CE2_N, CTS117, GPIO17, FL1, SD9, DPI_D13, RTS0, SPI1_CE1_N, RTS1Statistics: Posted by rpdom — Thu Jun 19, 2025 9:39 am