I have the latest stable version of Octopi set up on a raspberry PI 3 B+. Wireless is working fine. I have an Ethernet controlled relay (controlled by telnet) with a static IP address of 192.168.1.100. I am going to network it with my raspberry PI via an Ethernet jack. I already have a working python script that turns the relay on and off using my PC.
Q1: How do I set a static IP address of 192.168.1.2 on the Raspberrry's ethernet port (keeping wirless access for the OctoPi web application) considering that the OctoPi uses the file octopi-wpa-supplicant.txt for networking.