RGB LED controller and smart notifications indicator for my gaming PC, arduino controller with a .NET application to control the LED via PC. This is a personal project I made for myself, so use it at your own risk.
You can set custom colors using RGB sliders, minimize the application to tray.
Configure Automate or Tasker app on android to send a UDP packet to the PC with content "LEDX10:R,G,B,254", to trigger a notification animation. For example, for whatsapp notification I have set it to send "LEDX10:0,255,0,254" on receiving a WhatsApp notification.