Unfortunately we regret to see some projects uses ultrasonics for this type robots. You should never use ultrasonics for mini sumo or sumo robot for these reasons:

  • Slow response up to 70 mS!
  • High affection by vibration (if robot moves fast datas become unstable)

So we suggest infrared type beam reflective sensors. Infrared sensors have these advantages: 

  • Fast response (Between 0.5 mS to 10mS)
  • Not affected by vibration or noise.