NOT MAINTAINED ANYMORE
due to lack of time and lot of issues I've stopped using MOXA TTY server. I've switched to USB-1Wire convertor. If you have issues, look at the AUR repository, it is still maintained, and you can apply patches manually.
This repositary contain several branches for different kernels. All patches are from AUR repository for npreal2 driver (https://aur.archlinux.org/packages/npreal2/)
Please use branch "kernel_4.x.x" for kernel version 4.x
Please use branch "kernel_5.x.x" for kernel version 5.x