Now you know how to connect your Raspberry Pi to the Blynk cloud with a simple C++ application running on itself. You also know how to create a project with Blynk app builder running on your smartphone or tablet to connect with your Raspberry Pi through the Blynk cloud.

In this chapter, we will cover the following:

• Attaching an LED to the Raspberry Pi
• Building an application with Blynk app builder
• Using GPIO_BCM pins with the Button widget
• Using virtual pins with the Button widget
• Writing C++ code with nano editor
• Editing the build.sh file
• Controlling the LED on the Pi by running the Blynk application (the C++ project and the Blynk app)