I have two Raspberry Pi B+ and one Raspberry Pi 2. I would like to have the two B+ pis stream video to the model 2 pi. This is for a realtime computer vision application, so I need the absolute fastest configuration I can manage.
What configuration of hardware/protocols/library should I use?
The ethernet seems faster than USB, but because there are multiple Pis, I cannot use ethernet. Some people recommend a serial connection between the GPIOs, but I would think USB would be faster than that.
I have also read that I should just write to the /dev/tty* file associated with whatever option I use, but that seems too easy to work and I'm confused when data would then be read and written across the cables.
Any help is appreciated.