Wally Obstacle-Avoidance Robot: Let Wally Find Its Own Way

🚧 Wally Obstacle Avoidance — Find Its Own Way

🎯 Three Strategies Compared

Strategy	Principle	Pros/Cons
Random turn	Turn left/right randomly on obstacle	Simplest but low efficiency
Wall following	Always hug one side of a wall	High coverage, may miss spots
A* pathing	Pre-build map + optimal search	Optimal but needs a map

💻 Basic Avoidance Code

SAFE_DIST = 30
while True:
  dist = ultrasonic.read()
  if dist > SAFE_DIST:
    robot.forward(speed=70)
  else:
    robot.stop()
    robot.backward(0.3)
    random_turn()  # turn left or right randomly

🧪 Test Scenarios

• Simple corridor (straight + corner)
• Maze built from cartons
• Scattered books as obstacles
• Dynamic environment (person moving, test reaction)