Hello! I am using friendlycore-focal_4.14_armhf OS with NanoPi NEO Core board. I am going to connect the RS485 transmitter to the UART1. I have changed DTS to support RTS and CTS signals: I have chenged "pinctrl-0 = <&uart1_pins>;" to "pinctrl-0 = <&uart1_pins>,<&uart1_rts...