hi. so we don’t know how to connect the controller to the robot. Also, how do we connect 2 motors to 4 wheels?
you need to pair your controller with your brain (I’m assuming you’re using v5) by connecting the controller to a smart cable, and plugging the other end of the cable into one of the ports on the brain. then you can disconnect the cable, and plug a v5 radio into the brain to wirelessly connect the controller to your brain.
as for the wheels, you can power 2 of the wheels directly, and use chain to link to the other wheels.
Have you tried reading the booklet that comes with your controller?
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Well, connecting the controller to the robot is relatively simple. Here is a nice article from Vex about that:
Connecting 2 motors to 4 wheels can be done in a wide variety of ways. You could use gears, or chain and sprockets. It is really up to you exactly how you do it. I will leave a builder to go into that in detail.
You can either chain the 2 wheels on each side of the drivetrain together or connect then with gears. When using chain, remember to tension it.