This is a remix based on R2D2 Clock & Timer from jeje95
I've used some different configuration from the original version:

• Arduino nano (instead of ESP)
• RTC module
• Nano shield for connections

Basically it uses the rotary encoder button to configure alarm as you can see in the following video:

https://youtube.com/shorts/odZpx6V_PAg?feature=share

The alarm plays mp3 R2D2 sounds and turn on the leds in the head. You can stop the alarm clicking in the button of the rotary encoder:

https://youtube.com/shorts/0z7gBt356PU?feature=share

The code is available from:

https://tinyurl.com/yxx928zu

I've used different libraries to simplify the code:

• RTClib (clock)
• RotaryEncoder.h (alarm configuration mode & setting)
• ezButton (rotary encoder button)
• TM1637Display (blue display)
• SoftwareSerial (used with DFPlayer module)
• DFRobotDFPlayerMini (mp3 module)
• EEPROM (save configured alarm)
• LED (R2D2 head leds)

And you can check the base configuration and simulate the behaviour of the display and rotary encoder for alarm configuration:

https://wokwi.com/projects/401647812713663489

The pins on arduino board are:

• ROTARY_IN1 A1
• ROTARY_IN2 A2
• ROTARY_BUTTON 2
• DISPLAY_CLK 5
• DISPLAY_DIO 6
• DISPLAY_BRIGHTNESS_MIN 0
• DISPLAY_BRIGHTNESS_MAX 7
• DFPLAYER_RX 10
• DFPLAYER_TX 11
• LED_BLANK 3
• LED_RED 8
• LED_BLUE 9