In this chapter, we created a Bluetooth doorbell application using the Raspberry Pi and the Blue Dot Android app. We started out by learning a little bit about RGB LEDs, before incorporating one in an alarm circuit with an active buzzer.
With the Blue Dot app, we learned how to connect a Bluetooth button to our Raspberry Pi. We also learned how to use some of the Blue Dot gestures, and created a doorbell application with various ring durations.
In Chapter 12, Enhancing Our IoT Doorbell, we will extend the functionality of our doorbell, and have a text message sent whenever someone presses the button.
