I'm having trouble thinking of the best way to transmit live video using a pi zero w and a camera module through a wired ethernet connection of around 100ft. (model 3 could also be used) I want to overlay a couple sensor readouts like temperature and humidity onto the footage and some control using possibly rs485 or another protocol through ethernet would be great for changing camera angle using a servo with a joystick on the other end. (RS485 uses 2 wires)
HDMI to ethernet exists, however Is there a solution which does not use all 8 wires of the ethernet cable? Would there be a problem with interference between both signals? I am not sure how twisted pairs work with cancelling emf in an ethernet cable.
Ethernet cable is desirable for its cheap cost/ft!