This page links to external resources for Arduino
https://www.arduino.cc/en/Tutorial/HomePage?from=Main.Tutorials
https://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputs/overview
https://create.arduino.cc/projecthub/mayooghgirish/arduino-bluetooth-basic-tutorial-d8b737
https://www.instructables.com/id/Arduino-Servo-Motors/
https://create.arduino.cc/projecthub/SURYATEJA/use-a-buzzer-module-piezo-speaker-using-arduino-uno-89df45
https://randomnerdtutorials.com/20-free-guides-for-arduino-modules-and-sensors/
https://create.arduino.cc/projecthub/projects/tags/sensor