Xiaomi Cliff Sensor False Positive on Dark Surfaces

Robot vacuum's cliff sensors cause it to avoid dark rugs or black tiles as if they were drop-offs.

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Possible Causes

IR cliff sensor design sensitivity, Very dark or black flooring, Low ambient light, Firmware thresholds

How to Fix / Troubleshooting

Safety first: Never disable cliff sensors via hardware modification; this can cause falls down stairs.

  • 1. Clean cliff sensors:
    • Wipe all underside cliff sensor windows with a soft cloth.
  • 2. Improve lighting:
    • Increase ambient light in rooms with very dark floors.
  • 3. Use no-go zones:
    • If specific dark rugs cause issues, mark them as no-go zones in the app.
  • 4. Firmware update:
    • Update firmware; some updates improve sensor handling on dark floors.
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Repair Difficulty

Very Easy 1/5

Required Part

Cliff Sensor Board
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