I'm trying to use my RPI3 in order to read datas from ethernet communication and send them over wifi to a remote FTP server.
I've been able to connect my RPI3 to internet via wlan0 so far, however I've had troubles configuring the eth0 part of the network.
My problem mainly revolves around how I should handle eth0, I've read that in order to avoid issues I shouldn't use the same IP address as wlan0. But if I do that what adress should I put in eth0?
I might add that for software reasons I can't use DHCP to allocate addresses automatically, I can however change the connected device adress and gateway if I have to bring him back on the same subnetwork as wlan0.
Second strange point, when I add an IP route via "sudo ip route add" ways, it disappears upon reboot. I thereby tried to add it in static through DHCPCD.conf but it doesn't show up in ip route.
Thanks in advance