Hands-On Internet of Things with Blynk by Pradeeka Seneviratne

Author:Pradeeka Seneviratne
Language: eng
Format: epub
Publisher: Packt Publishing
Published: 2018-05-24T04:46:37+00:00

Settings for working with virtual pin V1

Tap the back icon on the toolbar to go to the canvas.

You can use the same C++ project you built in the previous section (Slider) without making any modifications. The Step widget uses virtual pin V1 to write values on WiringPi pin 1, which is a PWM pin.

Run the C++ project with this command:

pi@raspberrypi:~/blynk-library/linux $sudo ./blynk --token=ca7bed1c92214503a65de8e20164994f

Then, start your Blynk app by tapping the play button on the toolbar. Tap the increase and decrease buttons to change the value between 0 and 1023. The brightness of the LED will change according to the value output by the Step widget:

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