Light sensor

Smartphones and tablets have built-in light sensors (also known as ambient light sensors) to measure the light level and adjust the brightness of the screen accordingly to save the battery. Blynk provides a Light widget to take values from the built-in ambient light sensor on your smartphone. The light level can be measured in lux (symbol: lx).

Adding the Light Sensor widget

The following steps will show you how to add a Light widget to your Blynk app:

1. In the Widget Box, under SMARTPHONE SENSORS, tap Light Sensor
2. The Light Sensor widget will be added to the canvas

Configuring the Light Sensor widget

The Light Sensor widget only works with virtual pins:

1. Tap the Light Sensor widget to open the Light Sensor Settings page.
2. Under INPUT, tap PIN and in the Select pin list, select Virtual followed by V1.
3. Tap OK. Your Light Sensor Settings page should look like this (Figure 6.16):

Figure 6.16: Configured Light Settings page

4. Tap the back arrow on the toolbar to go to the canvas. Now, your Light...