Connect ultrasonic and relay according to the pin defined in source code. Created DFPlayer as library and can be used in any project.

An Arduino Mega runs the show, with a DFPlayer used to play the famous theme music as the cherry on top. It’s a fun build that would be an awesome addition to any hacker’s coffee table.

arduino pro mini Genuine DFPlayer mini mp3 module - clones with 'ME-ET LIVE' chips have fewer serial features and often don’t even work with the default serial Arduino example from DFPlayer. They are ...