If you're experiencing difficulties while working with your device, please try the following steps.
Problem: You're pressing the button, but the application does not recognize it.
Cause: There are two press levels of the button. You probably stop pushing to it after the first level.
Solution: Please push the button stronger.
Problem: The buzzer does not produce sound or produces incorrect tones.
Cause: The PWM pin drives the buzzer uses PWM channel 15. You probably use this channel with another component.
Solution: Please do not assign PWM channel 15 to any pin.