I have Rock Pi4B and printer 3D Sapphire Pro from Two Trees. In the Armbian I want use print server OctoPrint. Instalation OctoPrint was easly and server works but don't connect to my printer. When I use lsusb i see Bus 004 Device 003: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter. In the list dev/tty* don't shows me mounting port to this device. I try defined udev rules:
SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", SYMLINK+="sapphire"
or
SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", ATTRS{devpath}=="1.2", SYMLINK+="sapphire"
but without fine result. I'm rookie in linux and armbian and don't have the idea whot do it to valid define.
Please help me.