Consider a situation where a person while listening to music from a sound system in one room moves to another room, the volume of music fades away.
This smart music system when incorporated, if the person moves from first room to second room, the volume of music gradually decreases in first room and increases in the second room and vice versa.
The following programs are written in mbed language for WIZwiki-W7500 MCU.
For more information about the development board visit http://www.wiznet.io/product-item/wizwiki-w7500/
For compiling the programs to this development board visit https://os.mbed.com/