Hands-On Internet of Things with Blynk

Using digital pins

Let's configure the Slider widget to control the brightness of the LED using digital pins:

1. Tap the Slider widget to open the Slider Settings page:

Slider Settings page

2. Tap PIN under OUTPUT. On the left-hand side of the popup, choose Digital, and on the right-hand side of the popup, under PIN, choose gp 18 PWM (this is the only pin available on Raspberry Pi for PWM). Then, tap OK:

Selecting a digital pin for PWM

3. Change the maximum value for the OUTPUT to 1023 by replacing the default value of 255. Now, your Slider Settings ...