Power & Source of Big Ideas

I'm using the FriendlyWrt on a Nanopi core module.
I would like to perform an upgrade using the LuCI web interface.
How can i build a ....sysupgrade.bin for FriendlyWrt?
How can i create a ....sysupgrade.bin for FriendlyWrt?
Change in the folder kernel/arch/arm/boot/dts/overlays: sun8i_h3_uart1.dts "pinctrl-0 = <&uart1_pins>;" to "pinctrl-0 = <&uart1_pins>,<&uart1_rts_cts_pins>;" sun8i_h3_nanopi.dtsi "pinctrl-0 = <&uart1_pins>;" to "pinctrl-0 = <&uart1_pins>, <&...
Hardware: NanoPi Neo Core-LTS Software: FriendlyWrt I am using UART1. Tx and Rx work, but the hardware handshake with UART1_RTS and UART1_CTS do not work! The UART1 active settings are: root@FriendlyWrt:~# stty -a -F /dev/ttyS1 speed 1200 baud;stty: /dev/ttyS1; line = 0; intr = ^C; quit = ^\; erase ...