I have not done posted in awhile, but have been working on my raspibot. I have started testing some python code to send control commands from a PC to the raspberry Pi controlling the robot. The PC runs python code to read a joystick and then transmit a command over a tcp link to the raspibot. The code is still in the early test stages. Below are some more recent pictures of the raspibot. I have redone the mount for the ultrasonic sensor and camera so that the viewing angle can be lowered or raised.
First the camera and sensor pointing down.
Second the camera and sensor closer to level.
This is a rear shot and you can see the joystick.
When I get my python code cleaned up a bit I will post the github link.