A Time-of-Flight distance sensor can measure distances up to two meters with millimeter accuracy.

It works by emitting an invisible laser pulse and timing how long it takes it to reflect back from an object.

Ultrasonic sensors work similarly using sound waves, but they’re less accurate because different surface materials can absorb or scatter the sound waves.

Additionally, you can use the XSHUT pin to conserve power by turning the sensor off when it’s not needed. And the GPIO1 pin can be programmed to trigger an interrupt under certain conditions, reducing the need to constantly poll the sensor in your code.

Time-of-Flight sensors cost more than most hobby sensors, but their $3-$4 price tag is well worth it for the added precision.

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Time of Flight (ToF) sensors measure distances up to 2 meters with millimeter accuracy by emitting an invisible laser pulse and timing its reflection. Unlike ultrasonic sensors, ToF sensors are unaffected by surface material properties. These sensors are easy to wire with just four connections to a microcontroller and offer additional advanced features via GPIO and X shut pins. Despite a higher cost of $3 to $4, they provide superior precision.

Time of Flight Sensor