Coffee Delivering Robot - Delivers coffee between two fixed points: My lecturers office and the staff room (which are on the same floor).
delivers coffee to my lecturer, from the staffroom
How?
How?
the path from the office to
the path from the office to the staff room is hardcoded into the microcontroller, using a combination of wall following and straight line PID feedback control. Guess ill need to upload a pic of the actual path.
yeah, much more 
Even
yeah, much more Even hardcoded the failure could happen when the path is blocked or some conditions are changed.
the front sensor is used for
the front sensor is used for obstacle detection. If the robot comes into contact with an obstacle it will stop and wait. If the object is still blocking the path after some time, it will try to maneuver a way around the object, and restablish itself on the path.
How did you determine the
How did you determine the path? Yes, please show us the picture 
