set Threshold

Set the threshold value for dark or bright light.

sensors.color1.setThreshold(Light.Dark, 0)

Light intensity is measured from 0 (very dark) to 100 (very bright). You can decide what dark and bright mean for your purposes and set a threshold for them. A threshold is a boundary or a limit. If you want a light intensity of 20 mean that it’s dark, then you set the sensor threshold for dark to 20. Also, if you think that 75 is bright, then you can set the threshold for bright to that.

After setting a threshold, any event for that light condition won’t happen until the amount of light reaches your threshold value:

sensors.color1.setThreshold(Light.Dark, 20)
sensors.color1.onLightDetected(LightIntensityMode.Reflected, Light.Dark, function () {
    brick.showMood(moods.sleeping)
})

Parameters

• condition: the light intensity threshold to set, dark or bright.
• value: the value of light intensity for the threshold: 0 for very dark to 100 for very bright.

Example

Make a daylight alarm. When the ambient light reaches 70 flash the status light and play a sound.

sensors.color3.setThreshold(Light.Bright, 70)
sensors.color3.onLightDetected(LightIntensityMode.Ambient, Light.Bright, function () {
    brick.setStatusLight(StatusLight.GreenFlash)
    for (let i = 0; i < 5; i++) {
        music.playSoundEffectUntilDone(sounds.mechanicalBackingAlert)
    }
})

See also

threshold