Hi all, I need to enable rts/cts on my OrangePi Zero with Armbian buster with Linux 5.4.26-sunxi installed. I added the "param_uart2_rtscts=1" (I'm using /dev/ttyS2) to the /boot/armbianEnv.txt file   On mi code I use this initialization of the port. xxxxx.c_cflag |=         port_parity |         port_bits |         port_stop |         CLOCAL |         CRTSCTS |         CREAD;   Not only rts/cts but also the tx and rx pin aren't working now. Has a