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Infrared Sensor

class InfraredSensor(port)

LEGO® Powered Up Infrared Sensor.

Parameters:

port (Port) – Port to which the sensor is connected.

awaitdistance() → int: %

Measures the relative distance between the sensor and an object using infrared light.

Returns:

Distance ranging from 0% (closest) to 100% (farthest).

awaitreflection() → int: %

Measures the reflection of a surface using an infrared light.

Returns:

Measured reflection, ranging from 0% (no reflection) to 100% (high reflection).

awaitcount() → int

Counts the number of objects that have passed by the sensor.

Returns:

Number of objects counted.

Examples

Measuring distance, object count, and reflection

from pybricks.pupdevices import InfraredSensor
from pybricks.parameters import Port
from pybricks.tools import wait

# Initialize the sensor.
ir = InfraredSensor(Port.A)

while True:
    # Read all the information we can get from this sensor.
    dist = ir.distance()
    count = ir.count()
    ref = ir.reflection()

    # Print the values
    print("Distance:", dist, "Count:", count, "Reflection:", ref)

    # Move the sensor around and move your hands in front
    # of it to see what happens to the values.

    # Wait some time so we can read what is printed.
    wait(200)